Ch. 2 - Functions and Graphs

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Blitzer 8th Edition

Ch. 2 - Functions and Graphs

Problema 46

Capitolo 3, Problema 46

In Exercises 39–50, graph the given functions, f and g, in the same rectangular coordinate system. Select integers for x, starting with -2 and ending with 2. Once you have obtained your graphs, describe how the graph of g is related to the graph of f. f(x)= |x|, g(x) = |x| +1

Guida verificata passo dopo passo

Identify the given functions: \( f(x) = |x| \) and \( g(x) = |x| + 1 \).

Create a table of values for \( x \) from -2 to 2 for both functions. For each \( x \), calculate \( f(x) = |x| \) and \( g(x) = |x| + 1 \).

Plot the points for \( f(x) \) on the coordinate plane using the values from the table. Connect these points to form the graph of \( f(x) = |x| \), which is a V-shaped graph with its vertex at the origin (0,0).

Plot the points for \( g(x) \) on the same coordinate plane using the values from the table. Connect these points to form the graph of \( g(x) = |x| + 1 \), which will also be a V-shaped graph but shifted vertically.

Compare the two graphs and describe the transformation: since \( g(x) = f(x) + 1 \), the graph of \( g \) is the graph of \( f \) shifted upward by 1 unit.

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Absolute Value Function

The absolute value function, denoted |x|, outputs the non-negative value of x. Its graph is a V-shaped curve with the vertex at the origin (0,0), reflecting all negative inputs as positive outputs. Understanding this shape is essential for graphing f(x) = |x|.

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Percorso guidato

4:56

Function Composition

Function Transformation - Vertical Shift

Adding a constant to a function, as in g(x) = |x| + 1, shifts the graph vertically. Specifically, adding +1 moves the entire graph of f(x) = |x| up by one unit without changing its shape. Recognizing vertical shifts helps compare g(x) to f(x).

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Percorso guidato

5:34

Shifts of Functions

Graphing with Integer Inputs

Selecting integer values for x, such as from -2 to 2, allows for plotting specific points to visualize the function's graph. This method helps in accurately sketching and comparing the graphs of f and g on the same coordinate system.

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Percorso guidato

02:16

Graphs and Coordinates - Example

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