11/9 - Warm Up

Speedy Boat Rental charges a $15 deposit fee plus $2 for each hour of use to rent a paddle boat.  Write an equation for y, the total cost, to rent the boat for x hours.

• x = 2y + 15

• y = 15x + 2

• x = 15y + 2

• y = 2x + 15

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 = 12.5x + 30

• y = 12.5x - 30

• y = 30x + 12.5

• y = 30x - 12.5

Calculate the rate of change.

• m= -2
• m=-1/2
• m=2
• m=1/2

Which of the following has a rate of change of 3?

• A
• B
• C
• D

What is the rate of change for the following graph?

• 80
• 20
• 40
• 160

Find the rate of change.

• -2 minutes per gallon
• -20 minutes per gallon
• -2 gallons per minute
• -20 gallons per minute

Which variable represents y-intercept in the linear equation y=mx+b?

• y
• x
• m
• b

Which variable represents rate of change in the linear equation y=mx+b?

• y
• x
• m
• b

What is the y-intercept of this graph?

• (0,1)
• (0,-2)
• (0,0)
• (0,3)

What is the y-intercept of the line graphed below?

• 3
• 4
• -3
• 4/3