Question

Slope Intercept form 5x-9y=-7

Answer 1

slope intercept form is the form y=mx+c

so re-configure your equation to that form.
first divide by 5, then rearrange.

Answer 2

slope is -a\b
u should first re-arange the equation,so it will be 5x-9y+7=0
the accoring to the formula it gonna be ax+by-c=0

Answer 3

in your equation : 5x-9y+7..
a=5,b=-9 ,so -a\b=-5\-9=5\9 ,hope u understand it :)