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NeTakaya
3 years ago
5

Renata wins a $20 gift card to an online music site. After Renata purchases 16 songs, the gift card has a remaining

Mathematics
1 answer:
amm18123 years ago
7 0

Answer: y=20-1.25x

Step-by-step explanation:

The equation of the line in Slope-Intercept form is:

y=mx+b

Where "m" is the slope of the line and "b" is the y-intercept.

You need to analize the information given in the exercise.

You know that gift card had a total of $20. Then, since she started to buy the songs with $20, you can identify that:

b=20

Since Renata purchased 16 songs and the gift card had a remaining  balance of $0 after this, you can find the cost of each song. This is:

\frac{20}{16}=\$1.25

Therefore, she spent $1.25 per song. This means that the slope is:

m=-1.25

Then, you get that the equation that represents the relationship between "y" (the remaining balance on Renata's gift card) and "x" (the number of songs purchased) is:

y=20-1.25x

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