Answer:
A.
Step-by-step explanation:
Proportionality concerns the ratio between two values, so C and D can be knocked off since they talk about difference. So that leaves us A and B. To find out if m and k are proportional, let's find the ratio between them (which means dividing them) for each set of speeds:
11.0/17.699 = 0.6215040398
26.0/41.834 = 0.6215040398
34.0/54.706 = 0.6215040398
We can see that all of the ratios return the same number, which means that the ratio of m to k is constant, so therefore the relationship is proportional, and the answer is A.
