Question

slope 2/3 through (-9,3)

Answer 1

slope intercept form is y=mx+b
m=slope
so you plug in what you know
(3) = (2/3)(-9) + b
then solve for b

Answer 2

how do you substitute and simplify

Answer 3

corrdinates of (-9,3) refer to (x,y) so x=-9 and y=3
m=slope=2/3
to simplify (3) = (2/3)(-9) + b multiply 2/3 and -9 so
3 = -6 + b then you add 6 to both sides
+6 +6
9 = b
so your equation is y = (2/3)x + 9

Answer 4

ok thanks. might need more help.

Answer 5

or you can use point slope formula because you have the slope and a set of points....
y - y1 = m(x - x1)
slope(m) = 2/3
(-9,3) x1 = -9 and y1 = 3

now lets sub our info into the formula
y - y1 = m(x - x1)
y - 3 = 2/3(x - (-9)
y - 3 = 2/3(x + 9)
y - 3 = 2/3x + 6
y = 2/3x + 6 + 3
y = 2/3x + 9 <-- your answer

you can do it this way or jiggypuff's way...whichever one is easier for you :)

Answer 6

the problem is find the equation of the line hat goes through (-10,-6) and is perpendicuular to y=7. I wrote y=-6. is this right.