ahh thanks! umm i actually have two more questions (sorry!)
um a) caculate the x and y intercept of the staright line with the equation 3x-2y=9
and
b) transpose the equation 3y+7=5x+4 into y=mx+c form.
Whenever you have a line and you want to find the x & y intercepts, you can plug zero in for y to solve for the x intercept (which is where y would equal zero) and zero in for x to find the y intercept.
For part b, just solve for y. This is simple algebra:
$\displaystyle 3y + 7 = 5x + 4$
$\displaystyle 3y = 5x - 3$
$\displaystyle y = \frac{5}{3}x - 1$