Question

You brake your car from a speed of 55 mph. The table shows data that represent your car's speed versus the amount of time elapsed from the moment that you began to brake.

Elapsed Time (seconds)
Speed (mph)
1
47
2
39
3
31
4
23
5
23
6
23

Evaluate the following graph based on the data in the table.
A graph has elapsed time (seconds) on the x-axis, and speed (miles per hour) on the y-axis. A line goes through points (1, 47), (2, 39), (3, 31), (4, 23), (5, 23), (6, 23).
For what interval of time is the speed increasing?
For what interval of time is the speed decreasing?
For what interval of time is the speed constant?
a.
None
0 to 4 seconds
4 to 6 seconds
c.
None
0 to 5 seconds
5 to 6 seconds
b.
0 to 5 seconds
None
5 to 6 seconds
d.
0 to 4 seconds
None
4 to 6 seconds

Answer 1

Explanation:

d. 0 to 4 seconds, None, 4 to 6 seconds.

Based on the data in the table, the speed of the car is increasing for the interval of time from 0 to 4 seconds. After 4 seconds, the speed remains constant at 23 mph for the remainder of the time period. Therefore, the speed is not decreasing at any point in the given time interval.