Three points 4

The line passed through three points - see table:

x y
-6 4
-4 3
-2 2

Write line equation in y=mx+b form.

Correct answer:

f = -0.5x+1

Step-by-step explanation:

f(x) = m x+b  4=(6) m+b 3=4 m+b  b6m=4 b4m=3  Row2Row1Row2 b6m=4 2m=1  m=21=0.5 b=4+6m=4+6 (0.5)=1  b=1 m=21=0.5  f(x)=0.5x+1  f3=0.5 (2)+1=2  f=0.5x+1

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