7. higher order thinking the graph shows the speed of an airplane during a trip from city x to city z. a…

Explanation:

Step1: Recall function behavior rules

In a speed - time graph, when the graph is rising, the function (speed) is increasing; when the graph is falling, the function is decreasing.

Step2: Identify increasing intervals

Look for the parts of the graph where the speed is going up with respect to time. These are the intervals where the function is increasing.

Step3: Identify decreasing intervals

Look for the parts of the graph where the speed is going down with respect to time. These are the intervals where the function is decreasing.

Since the graph is not provided with specific time - value markings, we can only describe the general process. To actually compare the intervals, we would need to note the starting and ending times of the increasing and decreasing parts of the graph.

Answer:

Without specific time - value markings on the graph, we cannot precisely state the intervals. But in general, for part a, we look for the rising parts of the graph to find where the function is increasing, and for part b, we look for the falling parts of the graph to find where the function is decreasing.