Sofia used these steps to find the Inverse of function f. Step 1
f(3) = 3+1
given
Step 2
31 + 4
y =
8
change / () to y
Step 3
3y + 4
1 =
8
switch x and y
81
Step 4
II
3y + 4
multiply each side by 8
Step 5
81 – 4 = 3y
subtract 4 from each side
Step 6
241 – 12 = y
multiply each side by 3
Step 7
241 – 12 = 1-1()
replace y with 1-10)
Use this information to complete the statement.
Sofia made a mistake in step
She should have