Interpreting Linear Functions Practice

At what rate did the rain fall?

• 2 cm per hour

• ¹/₄ cm per hour

• ¹/₂ cm per hour

• 4 cm per hour

What type of association does this graph have?

• positive

• negative

• none

• all of the above

Which situation below is representative of y-intercept?

• Saving $300 per month

• Starting your day with $30 in your wallet

• Spending $3 per ride at the fair

• Paying $2 for parking every day

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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The graph shows the height (cm) of a candle as it burns, what is the y intercept and what does the y-intercept mean?

• b=9, Candle starts at 9 cm.

• b=9, the candle burns 9 inches per hour.

• b=2, the candle burns 2 inches per hour.

• b = 5, The candle ends at 5 cm

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.

After how many cakes will Dorothy run out of eggs?

How do you know?

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