*for 25 *
the graph shows the depth, y, in meters, of a shark from the surface of an ocean for a certain amount of time, x, in minutes
: a graph titled distance vs. time is shown. the x axis is labeled time in minutes and shows numbers 0, 1, 2, 3, 4, 5. the y axis is labeled distance from ocean surface in meters. a straight line joins the points c at ordered pair 0,60, b at ordered pair 1, 100, a at ordered pair 2, 140, and the ordered pair 3, 180.

part a: describe how you can use similar triangles to explain why the slope of the graph between points a and b is the same as the slope of the graph between points a and c.

part b: what are the initial value and slope of the graph and what do they represent?