A pitcher pitches a ball to a hitter. The ball is hit towards center field, hits the center field fence, then drops to the ground. Graph time on the x-axis and the height of the ball on the y-axis.

where is the figure

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.

english maybe i can ..