Graph each equation in Exercises 13 - 28. Let x = - 3, - 2, - 1, 0, 1, 2, 3
y = x + 2

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Identify the given equation: y = x + 2. This is a linear equation, which means its graph will be a straight line.

Create a table of values for x and y. Use the given x-values (-3, -2, -1, 0, 1, 2, 3). For each x-value, substitute it into the equation y = x + 2 to calculate the corresponding y-value.

For example, when x = -3, substitute into the equation: y = -3 + 2. Similarly, calculate y for all other x-values.

Plot the points (x, y) on a coordinate plane. Each pair of x and y values forms a point, such as (-3, -1), (-2, 0), etc.

Draw a straight line through all the plotted points. Since this is a linear equation, the points should align perfectly, forming a straight line.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Linear Equations

A linear equation is an algebraic expression that represents a straight line when graphed on a coordinate plane. It typically takes the form y = mx + b, where m is the slope and b is the y-intercept. Understanding linear equations is essential for graphing, as it allows students to identify the relationship between variables and predict values.

Graphing Points

Graphing points involves plotting specific coordinates on a Cartesian plane, where the x-coordinate indicates the horizontal position and the y-coordinate indicates the vertical position. For the equation y = x + 2, students will calculate y for given x values, such as -3, -2, -1, etc., and plot these points to visualize the linear relationship.

Slope and Y-Intercept

The slope of a line indicates its steepness and direction, calculated as the change in y over the change in x (rise/run). The y-intercept is the point where the line crosses the y-axis, represented by the value of y when x is zero. In the equation y = x + 2, the slope is 1 and the y-intercept is 2, which are crucial for understanding the line's behavior and graphing it accurately.

Graph each equation in Exercises 13 - 28. Let x = - 3, - 2, - 1, 0, 1, 2, 3 y = x + 2