The inverse function is written as y = -5/4 x + 5
what are inverse functions?
An inverse function in mathematics is a function that undoes another function.
f(x) = -4/5 x - 4
say
y = -4/5 x - 4
write the equation in terns of x
y - 4 = -4/5 x
x = -5/4 (y - 4)
x = -5/4 y + 5
interchanging the variables
y = -5/4 x + 5