Question

Here is an equation: 2x+4y=80 use the equation to help you complete the table.

Which equation represents the same relationship?

Answer 1

When x = 6, y is 17

When x = 12, y is 14

The equation of the line is D

Explanation:

2x + 4y = 80 Subtract 2x from both sides

2x - 2x + 4y = 80 - 2x

4y = 80 - 2x Divide both sides by 4

y = 20 - 2/4 x

y = 20 - 1/2x

Substitute x with 6

y = 20 - 1/2(6)

y = 20 - 3

y = 17

Substitute x with 12

y = 20 - 1/2(12)

y = 20 - 6

y = 14