Interpreting Linear Functions Graphically

Sandra has a $20 itunes gift card and spends $3 each month.

Write the equation to represent how much money Sandra has left on the gift card after x months.

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Which of the following points is a y-intercept?

• (-9,0)

• (-2,3)

• (4,-2)

• (0,5)

Dorothy loves to make cakes. The following table shows how the number of eggs that she has left changes as she makes cakes.

Interpret the y- intercept in context

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Interpret the point (12, 100)

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Derek works at Subway making $9.25 an hour.  The function d(x)=9.25x tells us how much money Derek makes after x hours of working.  What is the meaning of d(4)=37?

• After 4 hours of work, Derek makes $37.

• Derek needs $4 more to have $37 total.

• After working for 4 days, Derek makes $37 total.

• After 4 hours of work, Derek now makes $37 an hour instead of $9.25.

How long will it take the candle to burn completely?

How do you know?

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Find the slope between the two given points: (-2,1) and (5,7)

• 7/6

• 2

• 6/7

• -2

Why does this graph NOT match the function provided?

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Which graph represents 2x + 4y = 12?

• 
• 
• 
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Find the x and y intercepts
4x - 5y = 40

• x intercept is 10 
  y intercept is 8

• x intercept is 10
  y intercept is 20

• x intercept is 8
  y intercept is 10

• x intercept is 10
  y intercept is -8