The slope is (-10-4)/(8-1) = -2
The standard form of the equation is therefore
y = -2x + b.
To get b, use one of the points and the above equation & write
-10 = -2*8 + b
This tells you that
b = 6
y = -2x + 6
Write equation of line given 2 points (1,4) (8,-10)
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