Which of the following relations represents a function? a. { (2, 3), (1, 3), (3, 3) } c. { (1, 3), (2, 3), (1, 4) } b. { (1, 3), (2, 3), (2, 4) } d. { (2, 2), (2, 3), (2, 1) }

The point-slope formula is y - y1 = m( x - x1 ). In this case, y1 represents the y-coordinate of the point, m represents the slope, and x1 represents the x-coordinate of the point. To solve, all we need to do is plug in our given point and slope.

y - 4 = 5( x + 2 )