Linear Application

John is trying to save money this year. When he opened his account he had a balance of $300. By the end of the 12 month time span, John had $1500 in his savings account. Find the rate of change. Write an equation in slope-intercept form to model this situation.

• y = 100x - 300

• y = 100x + 300

• y = 1/10x + 300

• y = 1/10x - 300

What is the slope of the equation y = 3x -5?

• y

• 3

• x

• -5

A holiday meal costs $12.50 a person plus a delivery fee of $30.  Which equation represents the amount a holiday meal costs, including delivery, for x people?

• y = 30 + 12.5x 

• y = 12.5 + 30

• y = 12.5 + 30x

Easy Car Rental charges $8.50 an hour plus a rental fee of $25.50. Which equation represents the total charges for x hours?

• y = 8.5 + 25.5

• y = 8.5x + 25.5

• y = 8.5 + 25.5x

Johnny has to pay $15 for a large pizza and 1.50 for each topping. What is the meaning of the y-intercept?

• It cost 1.50 per topping

• It cost 1.50 for unlimited toppings

• It cost $15 for a large pizza

• It cost $15 for a large pizza with no toppings

A driving range charges $4 to rent a golf club plus $2.75 for every bucket of golf balls you hit. Write an equation that shows the total cost c of hitting b buckets of golf balls.

• c = 2.75b + 4

• c = 2.75b

• c =  4b- 2.75

• c = 2.75b - 4

Create a scatterplot from this data. Write the line of best fit for the data.

• y = 5.02x + 1.82

• y = 8x - 15

• y = 1.82x +5.02

• y = -1.82x +5.02

A man is climbing down from 100 feet high descending 30 feet per minute. Which function models his descent?

• y = 100 - 30x

• y = 100 + 30x

• y = 100x + 30

• y = 100x - 30

Which graph matches:
4-x for x<2
2x-6 for x>=2

• A

• B

• C

• D

Match the graph with the correct equation.

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