Which equation represents the relationship shown in the table below?
a. y = –x – 3
b. y = x – 3
c. y = 2x − 3
d. y = ­­–2x + 3

The answer is C because every time you plug in the x-coordinate, the correct y-coordinate comes out. The last ordered pair is (3,3). When you plug in the 3, the equation is y=2(3)-3.  Multiply, and y=6-3.  Subtract and the answer is y=3, which is correct. This works for all the ordered pairs in this equation, so the equation is C: y=2x-3.