Question

This table represents a relationship between x and y, where x is the independent variable.

x 1 2 3 4 5
y 2 4 6 8 10
Which equation represents the relationship between x and y?
x = 2y
y = x + 2
x = y + 2
y = 2x

Answer 1

y = 2x

Explanation:

quickest way : find the slope

which answer has that slope

(y2 - y1) ÷ (x2 - x1)

(10 - 8) ÷ (5 - 4)

2 ÷ 1 = 2

slope should be 2x