Question

Write the slope-intercept equation for the line that passes through (-9, 9) and is perpendicular to -9x - 2y = 10. Please show all of your work.

Answer 1

can you give me the slope that's perpendicular to the given line?
we'll need that to get the equation of the line you require.

Answer 2

m = -9x?

Answer 3

Are you there?

Answer 4

yes... i'm here... sorry i was afk for a bit...

Answer 5

to get the slope of the given equation, -9y - 2y =10, you'll need to write this out in slope-intercept form, y = mx + b so you can identify the slope....
in other words, solve for y.....

Answer 6

Sorry, I am at work and had to do something.

Answer 7

'sawrite....:) that's why the internet is so awesome....

Answer 8

Yea and if I can just understand this math , I will be awesome lol

Answer 9

do you need help solving for y?

Answer 10

Yes

Answer 11

ok...
solving for y means you need to get the y variable by itself on one side of the equal sign...

\(\large -9x - 2y =10 \)
add 2y to both sides then simplify:
\(\large -9x - 2y\color{red}{+2y} =10\color{red}{+2y} \)
\(\large -9x =10+2y \)

subtract 10 from both sides then simplify:
\(\large -9x\color{red}{-10} =10+2y\color{red}{-10} \)
\(\large -9x-10 =2y \)

divide by 2 to both sides then simplify:
\(\large \frac{-9}{2}x-\frac{10}{2} =y \)
\(\large \frac{-9}{2}x-5 =y \)

now your equation is in the form y = mx + b...
the slope is \(\large m=-\frac{9}{2} \)

Answer 12

now i need you to tell me the slope that is perpendicular to the line with a slope of \(\large m=-\frac{9}{2} \)

Answer 13

ok let me think for a minute

Answer 14

here's a hint:

\(\large m_1 \cdot m_2=-1 \) IF \(\large m_1 \perp m_2 \)

Answer 15

Where did the -1 come from?

Answer 16

Hello?