Section D Section D Checkpoint

Problem 1

Decide whether each graph represents a proportional relationship.

A
B
C

Show Solution
Solution
  1. no
  2. yes
  3. no
Show Sample Response
Sample Response
  1. no
  2. yes
  3. no

Problem 2

A cyclist is training for a race. The graph represents the relationship between her distance traveled and elapsed time during a training ride.

  1. Explain what the labeled point (4,113)(4, 1\frac13) represents in this situation.
  2. Use the graph to find the constant of proportionality for this relationship.
Show Solution
Solution
  1. It takes her 4 minutes to travel 1131\frac13 miles. 
  2. The constant of proportionality is 13\frac13. This is seen on the graph at the point (1,13)(1, \frac13).
Show Sample Response
Sample Response
  1. It takes her 4 minutes to travel 1131\frac13 miles. 
  2. The constant of proportionality is 13\frac13. This is seen on the graph at the point (1,13)(1, \frac13).