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What is the equation of a line that passes through points (0, 4) and (-4, -8)? A. y = 2x + 4 B. y = 2x - 4 C. y = 3x + 4 D. y = 3x - 4
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What is the equation of a line that passes through points (0, 4) and (-4, -8)?

A. y = 2x + 4
B. y = 2x - 4
C. y = 3x + 4
D. y = 3x - 4

User Goranek
by
7.6k points

2 Answers

3 votes
the answer is D. you know that the equation must end in +4 as the yintercept is at four (y=4 when x=0)
then you can work out that it is 3x because when x changes by -4, y changes by -12, which is three times as much.
Hope this makes sense!
User Bob Kimani
by
8.1k points
2 votes
slope = (-8 - 4)/(-4 -0) = -12/-4 = 3

y-intercept so b = 4

equation: y = 3x + 4

answer: C. y = 3x + 4
User Stephan Bauer
by
8.0k points
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