Question

A function with an input of 1 has an output of 3. Which of the following could not be the function equation?

y = 3 x
y = - x + 4
y = x - 2
y = 2 x + 1

Answer 1

y = x - 2

Explanation:

The easiet method is to plug in both the x and y value. If the statement is true, that means that answer choice is wrong. Doing this, you find that answer Choice 3 is not correct. That is your answer.