Find equation of a line that has point ( 1, -2 ) and slope -4

1 answer:

Colt1911 [192]3 years ago

4 0

∵It slop=-4
∴Equation is: y=-4x+b
∵Point (1,-2) in this line
(∴We can substitute x, y to 1, -2)
∴-4×1+b=-2
∴b=2
Equation: y=-4x+2

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