Evaluating Functions

Question 1

A graph shows the number of texts, numbered 10 to 100, on the x-axis, and the total cost in dollars, numbered 3 to 27, on the y-axis. A straight red line with a positive slope, labeled Emilia, begins at (0, 10), and a straight blue line with a positive slope, labeled Hiroto, begins at (0, 20). Both lines intersect at point (50, 22.5).

Revolt · Accepted Answer

Both plans cost the same when 50 texts are sent.

Question 2

Which represents the inverse of the function f(x) = 4x?

Revolt · Accepted Answer

h(x) = x

Question 3

If f(x) = + 8, what is f(x) when x = 10?

Revolt · Accepted Answer

13

Question 4

On a coordinate plane, a straight red line with a positive slope, labeled g of x, crosses the x-axis at (negative 3, 0) and the y-axis at (0, 3). A straight blue line with a positive slope, labeled f of x, crosses the y-axis at (0, negative 3) and the x-axis at (1, 0). Both lines intersect at (3, 6).

Revolt · Accepted Answer

f(3) = g(3)

Question 5

What is the inverse of the function f(x) = 2x + 1?

Revolt · Accepted Answer

h(x) = x –

Question 6

What is the inverse of the function f(x) = x + 2?

Revolt · Accepted Answer

h(x) = 9x – 18

Question 7

Which statement is true regarding the graphed functions?

Revolt · Accepted Answer

f(–2) = g(–2)

Question 8

What is the inverse of the function f(x) = 2x – 10?

Revolt · Accepted Answer

h(x) = x + 5

Question 9

The table represents the function f(x).

Revolt · Accepted Answer

9

Question 10

Which statement is true regarding the graphed functions?

Revolt · Accepted Answer

f(0) = g(0)

Evaluating Functions Answers

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