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Which equation is the equation of a line that passes through (–10, 3) and is perpendicular to y = 5x – 7?

y = 5x + 53
y = –x – 7
y = –x + 1
y = x + 5

Help - I don't understand...being told it is C but why?

3 answers

you should be able to see that the slope of y = 5x-7 is 5, right?

so, the perpendicular line has slope -1/5.

None of the choices has slope -1/5.
ok....thank you
The answer is y=-1/5x+1
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