Given the equation:
4x + 5y = -9
Convert the given equation to the slope intercept form which is like:
y = mx + c
where m is the slope and c is the y-intercept
So,
Divide all terms by 5
so,
Compare the last equation with the general form y = mx + c
so,
Slope = m = -4/5
And y-intercept = c = -9/5