Exercise 8 Page 90

Sometimes an exercise asks us to sketch a graph with a specific behavior, or maybe we just want to visualize the behavior of a relation. A good way to start is thinking about if the dependent variable is increasing or decreasing. If it is increasing, we can draw the first stroke with a slope slated upwards from left to right.

A car starts moving.

In the example above, we used a distance vs time graph to model the motion of a car. If we are told that the motion is now faster — if the dependent variable changes faster with respect to the independent variable — the next stroke would now have a steeper slope.