Question

Which of the following best describes how the y values are changing over each interval?

x
y
1
4
2
8
3
12
4
16
5
20

They are increasing by 4 each time.
They are increasing by 6 each time.
They are being multiplied by 2 each time.
They are being multiplied by 4 each time.

Answer 1

They are increasing by 4 each time.

Explanation: the y-values go 4, 8, 12, 16, 20 — each step adds 4 (8−4=4, 12−8=4, etc.).