Eric received a gift card worth $25 as a birthday present. He is spending $2.50 per day using the gift card, as shown in the graph below. Which statement is true about the linear function that represents his gift card spending?

Question

Mathematics

Gage Washington

9 October, 21:24

Eric received a gift card worth $25 as a birthday present. He is spending $2.50 per day using the gift card, as shown in the graph below. Which statement is true about the linear function that represents his gift card spending?

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Answers (1)

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Audrey Wade · Answer 1

We are given the initial mount of $25 and the consumption of $2.50 per day. In linear algebry, the initial amount is y-intercept and the consumption is the slope. In equation form, that is

y = - 2.5x + 25

where x is the number of days

and y is the amount left

The total amount will be used up after

0 = - 2.5x + 25

x = 10 days