# Finding both x and y intercept

• Jan 17th 2008, 01:47 PM
GeinoD
Finding both x and y intercept
ok, well the book give this example
2x-3y=6
which gives me
x=3
y=-2

But my homework question, doesnt seem to work and I have no examples to help.

Find both x-intercept and y-interceptof the given equation.

7x-8y+6=0

7x-8*0+6=0
7x+6=0
-6 -6
7x=-6
/7 /7
x=-6/7

7*0-8y+6=0
-8y+6=0
-6 -6
-8y=-6
/-8 /-8
y=-6/8

So I would have
x-intercept (-6/7,0)
y-intercept (0,-6/8)

This doesn't look correct.
• Jan 17th 2008, 02:27 PM
Jhevon
Quote:

Originally Posted by GeinoD
ok, well the book give this example
2x-3y=6
which gives me
x=3
y=-2

But my homework question, doesnt seem to work and I have no examples to help.

Find both x-intercept and y-interceptof the given equation.

7x-8y+6=0

7x-8*0+6=0
7x+6=0
-6 -6
7x=-6
/7 /7
x=-6/7

7*0-8y+6=0
-8y+6=0
-6 -6
-8y=-6
/-8 /-8
y=-6/8

So I would have
x-intercept (-6/7,0)
y-intercept (0,-6/8)

This doesn't look correct.

your y intercept is wrong (watch your signs. what sign should the result be if we divide a negative number by a negative number?) other than that, you're good
• Jan 17th 2008, 04:38 PM
GeinoD
:o It should have been positive. I get that confused all the time.