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Blizzard [7]
3 years ago
9

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

Mathematics
1 answer:
Elodia [21]3 years ago
7 0
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
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