# math

posted by student that needs help asap

What is the equation of a line that is perpendicular to 2x+y=−4 and passes through the point (2, −8)

my answer:
1/2x-9

AM I CORRECT OR NO ???

1. student that needs help asap

i mean y=1/2x-9

2. Reiny

nope, your slope is right, but when I substituted x = 2, I got
y = (1/2)(2) - 8
= 1 - 8
= -7

so the point does not lie on your line.

Furthermore, since the original equation was written in standard form, I think the same style of equation would be expected.

3. student that needs help asap

so its y=1/2x-7?

4. Reiny

Your equation was correct.
For some reason I wrote down your equation as
y = 1/2x-8 to do my calculation,

and I then carried through the calculations with my typo.

yes, it is y = (1/2)x - 9

5. student that needs help asap

thnk you !

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