Line cd passes through points (0, 2) and (4, 6). which equation represents line cd?

Y = x +2

You would find this by finding the slope first. Slope is (y2 - y1) / (x2-x1) = (6-2) / (4-0) or 4/4 = 1. the slope is 1. From the point (0, 2) you can tell that the y intercept is 2. Therefore you get the equation y = x+2