Question 640730
Please help me solve this,I am having a terrible time understanding this
 concept paired with actually graphing it...Thanks in advance!
Graph the linear equation by solving for y first;
4x + 5y = -15
For graphing we want to put this into the slope/intercept form (y=mx+b)
subtract 4x from both sides
5y = -4x - 15
Divide both sides by 5
y = {{{-4/5}}}x - 3
:
Select at least two values for x and solve for y, results:
 x | y
-------
-5 | 1;  (replace x with -5, -4(-1) - 3 = +4 - 3 = 1)
+5 |-7;  (replace x with +5, -4(+1) - 3 = -4 - 3 = -7)
Graph these two points, should look like this
{{{ graph( 300, 300, -6, 6, -8, 8, -.8x-3) }}}
:
You can confirm this, replace x and y in the original equation x=-5, y=1
4x + 5y = -15
4(-5) + 5(1) = -15
-20 + 5 =