Question

help
what is the equation of the line x-3y=18 in slope-intercept form?

Answer 1

First of all, do you know what slope-intercept form is?

Answer 2

yes

Answer 3

so then, what variable are we solving for here?

Answer 4

y

Answer 5

correct. So if we're given x-3y=18, what is our first step in solving?

Answer 6

subtract x from each side?

Answer 7

yes. So what would your equation look like after doing that?

Answer 8

3y=x-18?

Answer 9

ah, but don't forget not to mess up your signs.

Answer 10

Here's how the subtraction should look like:

x-3y=18
-x -x
--------
-3y= -x+18

^ I know it's not pretty, but we have to keep our signs. Does this make sense?

Answer 11

yes

Answer 12

okay, so what is our final step?

Answer 13

3y/3=-x-18/3?

Answer 14

Ah, like I said, don't forget to keep signs constant. But you are correct in dividing both sides by 3

Answer 15

it would look something more like this:

-3y= -x+18
/-3 /-3 /-3
----------
y= ?

Answer 16

can you finish the rest? :)

Answer 17

yes

Answer 18

thank you

Answer 19

no problem