Answer:
Mia's distance to the river is decreasing in the interval 0 < t < 1.25
Mia drives 100 miles to the beach.
Explanation:
A line that slopes down to the right is decreasing. It has negative slope.
A line that slopes up to the right is increasing. It has positive slope.
The graph slopes down to the right from time = 0 to time = 1.25 hours.
Mia's distance to the river is decreasing in the interval 0 < t < 1.25 .
On the top left of the graph, at time = 0, the distance to the river is 50 miles. Her house is 50 miles from the river. After the river, she drives another 50 miles to get to the beach. You see that at point (2.5, 50). Two-and-a-half hours after she leaves home, she is 50 miles away from the river after having driven a total of 100 miles.
Mia drives 100 miles to the beach.