Question

Find the slope of a line perpendicular to 3x+5y=15
5/3
-3/5
-5/3
3/5
* I got -3/5

Answer 1

what is slope of your line
that they gave you

Answer 2

and remember perpendicular should be opposite and change sign
for example if you r slope is a/b then your perpendicular slope would be -b/a flip it and change sign

Answer 3

3X + 5Y = 15

5Y = -3X + 15

Y = (-3/5)X + 3

The slope of this line is -3/5.

The slope of a line perpendicular to it is 5/3.

Answer 4

Hey. So basically, a perpendicular slope will have an oposite slope.
Our first step, of course, would be solving the equation into y = mx + b; so simply transpose your terms to solve for y.

3x+5y=15

i. Subtract 3x (3x - 3x + 5y = 15 - 3x)
ii. Now you have 5y = 15 - 3x

Okay, so from here just solve for y.

As for the slope; your slope will always be opposite. Everything stays the same; just take the opposite of your slope.

So if I have 2/1; the perpendicular form will be 1/2

Answer 5

Notice how the slopes are opposite of one another!

Answer 6

ahh ok

Answer 7

Parallel lines have equal slopes
Perpendicular lines have opposites