Unit 2B Review

 $For\ f\left(x\right)\ =\ -2x\ +\ 5,\ what\ is\ the\ value\ of\ f\left(-6\right)?\$  what is the 

•  $f\left(-6\right)\ =\ -17$  

•  $f\left(-6\right)=7$  

•  $f\left(-6\right)=-13$  

•  $f\left(-6\right)=17$  

Give the domain and range of the relation.

• Domain: {-5, 4, 6}; Range: {-9, 9, 13}

• Domain: {4, 6, -5, 13, 9}; Range: {0}

• Domain: {-9, 0, 0, 13}; Range: {-5, 0, 4, 6}

• Domain: {-6, -4, 0, 2}; Range: {24, 17, 3, 10}

The graph models the amount of money Frank saved. Which function models the same relationship

• $f\left(x\right)\ =\ \frac{3}{2}x\ +\ 30$

• $f\left(x\right)\ =\ 5x\ +\ 30$

• $30x\ +\ \frac{3}{2}$

• $f\left(x\right)\ =\ 30x\ +\ 15$

Describe the rate of change (slope) of the function below.

• 
  

  The rate of change is constant at  $\frac{5}{3}$  dollars per hour.

• The rate of change is constant at  $\frac{2}{3}$  dollars per hour.

• The rate of change is constant at  $\frac{4}{5}\$  dollars per hour.

• The rate of change is not constant.

Jessica joins a gym. She pays $10 to join and $5 each month for the membership fee. Which equation represents the relationship between the total cost, y, and the number of months, x?

• y = 10x + 5

• y = -10x + 5

• y = 5x + 10

• y = -5x + 10

Compare the rates of change for the two linear functions represented below. Which statement about the rates of change for the two functions is true?

• Function 2 does not have a constant rate of change, but Function 1 does.

• Function 2 has a greater rate of change than Function 1.

• Function 1 has a greater rate of change than Function 2.

• Function 1 and Function 2 have the same rate of change.

Given the table and equation below, which of the following statements is true about the functions f(x) and g(x)?

• The y-intercepts cannot be determined.

• The y-intercept of the function f(x) is equal to the y-intercept of the function g(x).

• The y-intercept of the function f(x) is less than the y-intercept of the function g(x).

• The y-intercept of the function f(x) is greater than the y-intercept of the function g(x).

A movie rental store charges a $10 membership fee plus $3.50 for each movie rented. what are the slope and y-intercept that represent this situation?

• slope = 3.50, y-intercept = -10

• slope = -10, y-intercept = 3.50

• slope = 3.50, y-intercept = 10

• slope = 6, y-intercept = 3.50

Write an equation of the line with slope of -4 and point (2, 6).

• y = -4x - 14

• y = -4x + 14

• y = -4x + 6

• y = -4x + 18

Determine the slope and y-intercept of the following equation. 7x - 2y = 10

• $slope:\ 7,\ intercept:\ 10$

• $slope:\ 7,\ y-intercept:\ -2$

• $slope:\ \frac{7}{2},\ y-intercept\ -5$

• $slope:\ -\frac{7}{2},\ y-intercept:\ 5$