# Slope Intercept Form

• Jan 2nd 2008, 12:22 PM
Twolvesfan14
Slope Intercept Form
Hello everyone,

I am having some troubles remembering the application of slope intercept form. The question is:

Write the line in slope intercept form. Identify slope and y-intercept. Then graph.

-2x + 3y=9
I understand slope intercept form, but forget how to find slope and y-intercept.

I think the y intercept is 3, but am completely blank on the slope.:confused:

Thank you all very much
Twolvesfan14:cool:
• Jan 2nd 2008, 12:43 PM
colby2152
Quote:

Originally Posted by Twolvesfan14
Hello everyone,

I am having some troubles remembering the application of slope intercept form. The question is:

Write the line in slope intercept form. Identify slope and y-intercept. Then graph.

-2x + 3y=9
I understand slope intercept form, but forget how to find slope and y-intercept.

I think the y intercept is 3, but am completely blank on the slope.:confused:

Thank you all very much
Twolvesfan14:cool:

$\displaystyle -2x + 3y=9$

$\displaystyle 3y=9+2x$

$\displaystyle y=\frac{2}{3}x + 3$

Y-intercept is three
Slope is two thirds
• Jan 2nd 2008, 12:50 PM
Twolvesfan14
So, just to make sure I understand this, the next problem is 8x - y=2

8x - y=2

y = -2 - 8x

Slope= -8
Y int = -2

correct?
• Jan 2nd 2008, 03:30 PM
topsquark
Quote:

Originally Posted by Twolvesfan14
So, just to make sure I understand this, the next problem is 8x - y=2

8x - y=2

y = -2 - 8x

Slope= -8
Y int = -2

correct?

Yup! :)

-Dan