+4 What is the slope of a line perpendicular to the line whose equation is \(\frac{x}{4} - \frac{y}{5}=1\)? Express your answer as a common fraction.
+36915 x/4 - y/5 =1
Put it into y= mx + b form slope will be 'm' perpindicular slope is - 1/m
y/5 = x/4 -1
y = 5/4 x - 5 slope is 5/4 perpindicular is -1/(5/4) = - 4/5
