A table pairs hours x with distance y: (2, 9), (5, 22.5), and (8, 36). Is the relationship proportional, and what is its constant of proportionality?
Answer
Yes; k = 4.5 miles per hour
Reasoning Strategy
Calculate y/x for every pair and verify that each ratio equals 4.5.
AI Support Preview
Write the unit next to each ratio and use y = 4.5x to check one row.