# Week 3 Practice (2C, 2I, 3B, 3C, 3D, 5C)

## Quiz by Lainey Travis

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includes Teacher and Student dashboards

### Measures 3 skills from

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- Q1
A customer pays an annual membership fee of $85 to a neighborhood car wash. Each time he takes his car to the car wash, he pays only $7. The total amount of money he spends at the car wash in one year in dollars can be found using the function y = 7x + 85. What does the variable x represent in this function?

The cost each time the customer takes his car to the car wash.

The number of times the customer takes his car to the car wash in one year.

The total amount of money the customer spends each month at the car wash.

The number of months the customer has been a member at the car wash.

30sA.3.B: Rate Of Change - Q2
A savings account balance can be modeled by the graph of the linear function shown on the grid. What is the rate of change of the balance with respect to the number of deposits?

$0.50 per deposit

$50 per deposit

$2 per deposit

$100 per deposit

30sA.3.B: Rate Of Change - Q3
The table represents some points on the graph of a linear function. What is the rate of change of y with respect to x for this function?

- $\backslash frac\{9\}\{2\}$

$\backslash frac\{9\}\{2\}$

$\backslash frac\{2\}\{9\}$

-$\backslash frac\{2\}\{9\}$

30sA.3.B: Rate Of Change - Q4
The graph shows how the volume of a gas sample changes as the temperature changes and the pressure remains constant. Which of these best represents the rate of change in the volume of the gas sample with respect to the temperature?

22 mL / $\backslash degree\; C$

$\backslash frac\{7\}\{100\}$mL / $\backslash degree\; C$

$\backslash frac\{1\}\{12\}$ mL / $\backslash degree\; C$

12 mL / $\backslash degree\; C$

30sA.3.B: Rate Of Change - Q5
The graph models the linear relationship between the temperature of Earth’s atmosphere and the altitude above sea level. Which of these best represents the rate of change of the temperature with respect to altitude?

-6.5°C/km

-3.5°C/km

-0.15°C/km

-0.29°C/km

30sA.3.B: Rate Of Change - Q6
The function y = 3.75 + 1.5(x - 1) can be used to determine the cost in dollars for a taxi ride of x miles. What is the rate of change of the cost in dollars with respect to the number of miles?

$5.25 per mile

$3.75 per mile

$1.50 per mile

$4.25 per mile

30sA.3.B: Rate Of Change - Q7
The graph shows the linear relationship between the maximum area in square feet that can be painted and the number of gallons of paint used. Which of these best represents the rate of change of the maximum area painted with respect to the number of gallons of paint used?

$\backslash frac\{1\}\{200\}\; ft^2\; /gal$

$200ft^2/gal$

$\backslash frac\{1\}\{400\}ft^2/gal$

$400\; ft^2\; /gal$

30sA.3.B: Rate Of Change - Q8
The table shows the linear relationship between the balance of a student's savings account and the number of weeks he has been saving. Based on the table, what was the rate of change of the balance of the student's savings account in dollars and cents per week? Record your answer and fill in the bubbles on your answer document.

Users enter free textType an Answer30sA.3.B: Rate Of Change - Q9
What is the y-intercept of the line graphed on the grid?

Users enter free textType an Answer30sA.3.C: Graph Linear Functions - Q10
Which graph represents -3x + 5y = - 15?

30sA.3.C: Graph Linear Functions - Q11
Which graph shows a line with an x-intercept of -5?

30sA.3.C: Graph Linear Functions - Q12
A lifeguard earns $320 per week for working 40 hours plus $12 per hour worked over 40 hours. A lifeguard can work a maximum of 60 hours per week. Which graph best represents the lifeguard’s weekly earnings in dollars for working h hours over 40?

30sA.3.C: Graph Linear Functions - Q13
The graph of a function is shown on the grid. Which ordered pair best represents the location of the y-intercept?

(0, -2)

($\backslash frac\{1\}\{3\}$,0)

(-2, 0)

(0, $\backslash frac\{1\}\{3\}$)

30sA.3.C: Graph Linear Functions - Q14
The graph of linear function g is shown on the grid. What is the zero of g?

Users enter free textType an Answer30sA.3.C: Graph Linear Functions - Q15
The water level of a river was measured each day during a two-week period. The graph models the linear relationship between the water level of the river in feet and the number of days the water level was measured. Which statement best describes the y-intercept of the graph?

The maximum water level was 19.5 ft

The water level was measured for 14 days.

The initial water level was 16 ft.

The water level increased by 0.25 ft per day.

30sA.3.C: Graph Linear Functions