Which function is the inverse of f(x) = 1/2x + 5 ?
f−1(x) = 2x−10
f−1(x)= 2x + 10
f−1(x)= 2x − 5
f−1(x) =2x + 5
replace x and f(x)
x=1/2(f(x) +5
solved is 2x-10=f(x)
+912 
