Math 1 Revision

Which is an equation of the line graphed below?

• 8y - 9x = 13

• 8x - 9y = 13

• 9x - 8y = 13

• 9y - 8x = 13

Which is an equation of the function graphed below?

• 4x – 5y = 20

• 5y – 4x = 20

• 5x – 4y = 20

• 4y – 5x = 20

The function v(t) = 22,500 – 1,020t models the value of a car t years after it was purchased. What is the meaning of v(3)?

• the purchase price of the car

• the yearly decrease in the car’s value

• the costs of operating the car for 3 years

• the value of the car 3 years after the purchase

An electricity company charges $0.19 per kilowatt-hour of electricity, plus a basic connection charge of $38.00 per month. The function c(x) = 0.19x + 38 represents the total amount customers will pay based on the number of kilowatt-hours of electricity used, x. Which is the best interpretation of c(1,500)?

• Customers will pay $323 if they use 1,500 kilowatt-hours of power.

• Customers will pay $7,694 if they use 1,500 kilowatt-hours of power.

• Customers will pay $1,500 if they use 323 kilowatt-hours of power.

• Customers will pay $1,500 if they use 7,694 kilowatt-hours of power.

A dance studio charges all new members a $149 application fee, plus $25 per month. The function f(m) = 25m + 149 models the total cost to be a member for m months. How much will Stacie pay for a 2-year membership?

• $199

• $449

• $749

• $4,176

Which statement best describes the two functions?

• The slope of f(x) is less than the slope of g(x) .

• The slope of f(x) is equal to the slope of g(x)

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

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

A function, f(x) , is graphed below. A function, g(x) , fits the values in the table below. What is the value of g(5) - f(5) ?

• 5

• 17

• 22

• 27

Lakisha compared the function f(x) = -3x + 4 to the function g(x), graphed below. What is the difference between the slopes of the functions?

• 5

• 6

• 8

• 9

Shane uses the function f(x) = 120x - 52 to determine his profit when he makes and sells x cakes. What does the y-intercept of the function represent?

• Shane earns $120 for each cake he sells.

• Shane earns $52 for each cake he sells.

• Shane spends $120 on supplies.

• Shane spends $52 on supplies.

This table shows the temperature in a city over several hours. What is the average rate of change from 4:00 p.m. to 6:00 p.m.?

• -14°F per hour

• -7°F per hour

• -5°F per hour

• -2°F per hour