Question

A study was done to investigate the relationship between outdoor temperature and the amount of fluids an outdoor athlete drinks per day. The correlating linear model is shown below, where x represents the number of degrees over 80°F, and y represents the amount of fluids drank (in liters). Interpret the y-intercept.

y = 3.85 + 0.55x
An athlete drinks 4.4 L per day when the temperature is 80°F.

An athlete drinks 3.85 L per day when the temperature is 80°F.

An athlete drinks 7 L per day when the temperature is 80°F.

An athlete drinks 0.55 L per day when the temperature is 80°F

Answer 1

i like your name haha !!!!!

Answer 2

@Michele_Laino

Answer 3

Thanks @Caitlynsmith6427

Answer 4

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Answer 5

@pootypie please substitute x=80 in your equation, and write your answer

Answer 6

@pootypie I think is the second answer, namely "An athlete drinks 3.85 L per day when the temperature is 80°F", because x indicates the difference between the rela temperature and 80, namely x=T-80, so your equation becomes:
\[y=3.85+0.55*(T-80)\]

Setting T=80, you will get y=3.85