Question

The table shows the relationship between the depth, in meters, of a submarine and

the time, in minutes, since it started a dive.
Submarine Depth
Time (minutes) Depth (meters)
2
100
4
180
09
260
8
340
Part B
Determine whether the relationship is proportional or not. Explain how the relationship
shown in the table supports your answer. Explain how your graph supports your answer.
Enter your answer and your explanations in the space provided.

Answer 1

9514 1404 393

Answer:

not proportional -- the y-intercept is not zero

Explanation:

A quick check of table values shows the relationship is not proportional:

100/2 = 50 ≠ 45 = 180/4

That is, the ratios of table values are not constant.

__

When the values are graphed, the line through the points does not intersect the origin. This is further indication the relationship is not proportional.