8.F.4 Redemption

Which equation represents the situation described: Jim charges $150 plus $60 per hour to move furniture.

• y = 60x + 150
• y = 150x + 60
• y = 60x
• y = 2.5x + 150

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8.F.4

Which equation represents the situation described: A building supply company sells gravel for a fixed delivery fee of $50 for the order plus $75 per cubic yard.

• y = 50x + 75
• y = 1.5x + 75
• y = 75x + 50
• y = 1.5x

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8.F.4

Amber's savings account had a balance of $350 rolled over from the previous year. She set it up for $50 to be drafted out of her checking account and into her savings account every month. What information in this problem represents the y-intercept?

• The amount of money rolled over from savings

• Her total savings

• The number of months

• The money that comes over each month

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8.F.4

An online music service lets customers download an unlimited number of songs for $0.25 each after paying a monthly membership fee of $5.00. What does the slope represent?

• The total amount of money the customer spends on music each month

• The number of songs the customer downloads each month

• The number of customers that use the music service

• The cost of downloading one song

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8.F.4

Find the slope from the table:

• -2/5
• 5/-2
• 5/2
• 2/5

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8.F.4

What is the y-intercept?

• 7

• 0

• 1

• 2

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8.F.4

Which equation matches the table?

• y = x + 5
• y = 5x
• y = x - 5
• x = y - 5

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8.F.4

Choose the function that is linear.

• y = x²

• f(x) = x³ + 5

• y = 3x + 4

• y = 7x^-2 + x + 14

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8.F.3

Why is this function nonlinear?

• This function is nonlinear because it has a constant rate of change.

• This function is nonlinear because the x-term is raised to the second power therefore doesn't have a constant rate of change.

• The function is nonlinear because the y-intecept is (0,1)

• This function is nonlinear because there is a coefficient of 1.

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8.F.3

Why is this function linear?

• This is a linear function because the y-intercept is (0,2)
• This is a linear function because it forms a curved line.
• This is a linear function because is does not have a constant rate of change.
• This is a linear function because is has a constant rate of change.

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8.F.3