Question

This graph shows a proportional relationship.

What is the constant of proportionality?

Enter your answer as a decimal in the box.

Answer 1

3.18 is the answer to the question

Answer 2

Answer: 13.8

Explanation:

Divide y over x for any of the two points given

• y/x = 27.60/2 = 13.8
• y/x = 82.80/6 = 13.8

You only need to do one calculation, but you can do both to get practice.

Extra info:

• The equation of this line is y = 13.8x
• The 13.8 represents the slope of the line. In this case, it's Fred's wage. He earns $13.80 per hour.
• All direct proportion equations go through the origin (0,0)