Answer:
4
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c is the y- intercept )
f(r) = - [tex]\frac{5}{9}[/tex] r + 4 ← is in slope- intercept form
with slope m = - [tex]\frac{5}{9}[/tex] and y- intercept c = 4 → (0, 4 )
