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,
![\begin{gathered} 4x+5y=-9 \\ 5y=-4x-9 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/nvgsoym76edlny2y2og4n9g2k0vplw2tao.png)
Divide all terms by 5
so,
![y=-(4)/(5)x-(9)/(5)](https://img.qammunity.org/2023/formulas/mathematics/college/ps21avrgfmbgmqamaiql6ranotb0yyn420.png)
Compare the last equation with the general form y = mx + c
so,
Slope = m = -4/5
And y-intercept = c = -9/5