Writing and interpreting linear functions

Picture frames from a frame website cost $50 each and $10 for shipping. Write an equation for the total cost of buying picture frames from this website.

• $50x+10=y$

• $10x+50=y$

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

A car rental company charges $56 plus $0.30 per mile driven.

Write a linear function to model this situation.

• y = 56x + 0.30

• 56x + 0.30y = 86

• y = 0.30x + 56

• y = 56 - 0.30x

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

5. A taxicab company charges $4.50 for each trip plus an additional $2.50 per mile traveled. How much will the company charge if the trip is:

B. 16 miles?

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Question 3: write the equation.

• y = -3/4x

• y = -3/4x + 7

• y = -10/4x + 7

• y = 7x - 3/4

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Suppose you have $1,200 and begin to spend $50 each week.  Choose the equation in slope-intercept form for the amount of money y you will have after saving for x weeks.

• y = 50x + 1200

• y = 1200x + 50

• y = -50x + 1200

• y = 50x - 1200

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Riley charges a $10 fee just to show up, and then $8 a minute to play piano for events. What equation shows how much she charges for x minutes of piano playing?

• 10x+8=y

• 8x+10=y

• 10+x+8=y

• 10xy=8

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Linear Functions relate to the:

• A. Geometric Sequence

• B. Arithmetic Sequence

• C. Exponential Sequence

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

A comic book has an initial value of $10. The value of the book increases by $2 each year.

• y=10x+2

• y=2x+10

• y=2+10

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2

After a laptop is purchased, its value decreases by $150 each year. After 2 years, the laptop is worth $600. Write and equation to model this situation. No spaces. Use x and y.

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2