Given the equation :

we need to write the given equation in slope - intercept form
The general slope intercept form is :

So, we need to convert the 4x - 3y = 9 to the previous form
So, solve the given equation for y ( make y alone on the left side )
So,

Subtract (4x) from both sides

Divide all terms by -3

So, the slope will be the coefficient of x = 4/3
Slope = 4/3