looking for is the arctangent of 3. Nobody expects you to know the value of
arctan(3) off the top of your head. Use your calculator:
The answer is (C).
In the next example, a calculator is not required, but knowledge of certain
operations could save you time.
Given the table below, which function represents the values in the
table?
x y
1 −1
3 5
5 11
7 17
9 23
4.
(A) y = 2x – 3
(B) x = 3y – 4
(C) x = 2y – 3
(D) y = 3x – 4
(E) y = x – 2