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20 POINTS!!! I need help urgently with the question in the picture below!

20 POINTS!!! I need help urgently with the question in the picture below!
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1 vote
20 POINTS!!!

I need help urgently with the question in the picture below!

20 POINTS!!! I need help urgently with the question in the picture below!-example-1
User Askaroni
by
8.5k points

1 Answer

5 votes
let f(x)=ax+b
11a+b=23.55
12a+b=25.35

solve: a=1.8 b=3.75
so ..

f(x)=1.8x+3.75
if x=31 , f(x)=59.55
User Salvius
by
7.6k points
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