Question

. The relationship between the length of one side of a square, x, and the perimeter of the square, y, can be represented in an xy-plane by a straight line. Which of the points with coordinates (x, y) lie on the line? (2013 or 2014) *

6 points
(2, 6)
(2, 8)
(6, 2)
(8, 2)

Answer 1

(2,8)

Explanation:

Answer 2

y = 4x

Explanation:

You just have to know the relationship of the perimeter with the side length.

If the side length is x, the perimeter would be P = 2x + 2x = 4x

so if the perimeter is y, then y = 4x

y = 4x is the equation of the line.

One at a time, plug in the x values until you find one that gives the right y value.