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Find the y=mx+b of the two points (4,2),(8,4)

User Jaclynn
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1 Answer

7 votes

Answer:


y=0.5x\\\\m=0.5\\b=0

Explanation:

First, the slope is found by using rise/run. The function went 2 units up and 4 units down, so the slope is 2/4 = 1/2.

Then we can use the point-slope notation
y-y_(1)=m(x-x_(1)) to find the point-slope form.

Let's take (4, 2) as the point.


y_(1)=2\\x_(1)=4\\m=0.5\\y-2=0.5(x-4)

Converting that into slope-intercept:


y-2=0.5(x-4)\\y-2=0.5x-2\\y=0.5x\\

User Ehynds
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