SOLUTION: find a linear function,f, given f(9)= 12.5 and f(-9)=3.5

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Question 442692: find a linear function,f, given f(9)= 12.5 and f(-9)=3.5
Answer by swincher4391(1107) About Me  (Show Source):
You can put this solution on YOUR website!
You are given two points: (9,12.5) (-9,3.5)
12.5 - 3.5
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9 + 9
9/18 = 1/2
y+-+12.5+=+expr%281%2F2%29%28x-9%29
y+-12.5+=+expr%281%2F2%29x+-+expr%289%2F2%29
y+=+expr%281%2F2%29x+-+expr%289%2F2%29+%2B+expr%2825%2F2%29
highlight%28y+=+expr%281%2F2%29x+%2B+8%29