Question

The graph shows how the depth of a submarine increased as it dove beneath the ocean surface.

The graph titled Submarine depth shows depth in meters on the vertical axis from 0 to 20 in increments of 2 and time in seconds from 0 to 5 on the horizontal axis. The line joins the points (0, 0) and (1, 3).

What can be concluded from the information on the graph?

A.
The submarine’s depth increased at a rate of
1
3
meter per second.

B.
The submarine’s depth increased from 1 meter to 3 meters in 1 second.

C.
The submarine’s depth increased at a rate of 3 meters per second.

D.
The submarine’s depth increased from 1 meter to 3 meters in 3 seconds.

Answer 1

C

The line goes from (0, 0) to (1, 3), so the depth changed by 3 m in 1 s. The rate (slope) = (3 − 0)/(1 − 0) = 3 meters per second.