Determine if each equation is a function. y = 2 x + 3 y=2x+3

Are asked in this problem to determine if each equation is a function, and here we're given the equation y is equal to two x plus three. So we know that this is a relation that we're dealing with, but is it a function? Well, what we're going to do is test some x values here. Because remember, every x value or input that you have has to result in at most one y value or output in order for it to be a function. Now what I'm first going to do is try an x value of zero. So we'll have two times zero plus three, which all just comes out to three. Now notice I have one input, which is zero, and I get one output, which is three. So we're good. Let's try another x value, let's try one this time. So we have an x value of one, and two times one plus three comes out to five. Notice that our one input gives us one output of five, so we're still good. Let's try a negative number. Let's try, say, negative two. I'm just choosing a random x value here, plus three. Well, two times negative two is four, plus three would give us negative one. Notice that one x value, negative two, gave us one y value of negative one. So notice that really, no matter what we try, we only ever seem to be getting one output or one y value. And you can try a whole bunch of different inputs for x. You're gonna find every time it's just gonna give you one y value. You could also recognize that this is in fact a linear equation. This would be a line on a graph, which we know would pass the vertical line test. So no matter how about you or no matter how you go about this, you're going to find every single time this does come out to one output, meaning it is in fact a function. Hope you found this helpful.

Skip topic navigation

1. Review of Real Numbers2h 43m

Simplifying Fractions
30m

Evaluating Exponents
29m

Evaluating Expressions
15m

Translating Phrases to Expressions
16m

Translating Sentences to Equations
9m

The Distributive Property
17m

Simplifying Expressions
44m

2. Linear Equations and Inequalities5h 35m

Solving Linear Equations
2h 23m

Linear Inequalities in One Variable
46m

Set Operations and Compound Inequalities
1h 7m

Absolute Value Equations
38m

Absolute Value Inequalities
39m

3. Solving Word Problems2h 46m

Introduction to Problem Solving
37m

Formulas
25m

Percent Problem Solving
59m

Mixture Problem Solving
43m

4. Graphs and Functions5h 12m

The Rectangular Coordinate System
44m

Graph Linear Equations in Two Variables
24m

Graph Linear Equations Using Intercepts
23m

Slope of a Line
44m

Slope-Intercept Form
38m

Point Slope Form
22m

Linear Inequalities in Two Variables
28m

Introduction to Relations and Functions
53m

Function Notation
15m

Composition of Functions
17m

5. Systems of Linear Equations1h 53m

Solving Systems of Linear Equations by Graphing
29m

Solving Systems of Linear Equations by Substitution
15m

Solving Systems of Linear Equations by Elimination
45m

Systems of Linear Inequalities
23m

6. Exponents, Polynomials, and Polynomial Functions3h 17m

The Product Rule
9m

The Quotient Rule
10m

Intro to the Power Rules
17m

The Power of a Quotient Rule
13m

Negative Exponents
24m

Simplifying Exponential Expressions Using All Exponent Rules
6m

Intro to Polynomials
21m

Adding and Subtracting Polynomials
20m

Multiplying Polynomials
38m

Special Products
34m

7. Factoring2h 49m

Factoring by Greatest Common Factor & Grouping
37m

Factoring Trinomials of the Form x² + bx + c
11m

Factoring Trinomials of the Form ax² + bx + c
37m

Factoring Special Products
41m

Quadratic Equations & Applications
41m

8. Rational Expressions and Functions3h 44m

Simplifying Rational Expressions
42m

Multiplying and Dividing Rational Expressions
25m

Adding and Subtracting Rational Expressions with Common Denominators
19m

Least Common Denominators
32m

Adding and Subtracting Rational Expressions with Different Denominators
32m

Rational Equations
44m

Direct & Inverse Variation
27m

9. Roots, Radicals, and Complex Numbers3h 57m

Introduction to Radical Expressions
47m

Simplifying Radical Expressions
47m

Adding and Subtracting Radicals
19m

Multiplying, Dividing, and Rationalizing Radicals
53m

Introduction to Complex Numbers
18m

Multiplying and Dividing Complex Numbers
51m

10. Quadratic Equations and Functions3h 1m

The Square Root Property
25m

Completing the Square
26m

The Quadratic Formula
40m

Graphing Quadratic Equations
1h 28m

11. Inverse, Exponential, & Logarithmic Functions2h 30m

Introduction to Inverse Functions
25m

Exponential Functions
35m

Introduction to Logarithmic Functions
33m

Properties of Logarithms
54m

12. Conic Sections & Systems of Nonlinear Equations2h 24m

Graphing Circles
32m

Ellipses
35m

Parabolas
35m

Hyperbolas
41m

13. Sequences, Series, and the Binomial Theorem1h 50m

Introduction to Sequences
40m

Arithmetic Sequences
27m

Geometric Sequences
29m

Factorials
13m

4. Graphs and Functions

Introduction to Relations and Functions

Intermediate Algebra

4. Graphs and Functions

Introduction to Relations and Functions

이전 문제다음 문제

Intermediate Algebra 때문에 힘들어하고 계신가요?

저희를 신뢰하는 수천 명의 학생들이 시험 합류하세요!

객관식

Determine if each equation is a function.
$y = 2 x + 3$

Function

Not a function

Cannot be determined

0 댓글

이전 문제다음 문제

검증된 단계별 안내

Recall the definition of a function: a relation where each input (x-value) corresponds to exactly one output (y-value).

Look at the given equation: $y = 2x + 3$. This is a linear equation where y is expressed explicitly in terms of x.

For every value of x, calculate y by substituting x into the equation. Since the equation is linear and has no restrictions, each x gives exactly one y.

Because each input x has exactly one output y, the relation described by $y = 2x + 3$ satisfies the definition of a function.

Therefore, conclude that the equation represents a function.