Question

Juno takes a typing test to see how many words per minute she can type. The test produced the equation y = 62x , where x represents the number of minutes and y

represents the total number of words.

a) Does the equation represent a proportional relationship? Explain your reasoning.

b) What is the unit rate of change for this situation?

Answer 1

• A) Yes,
• B) 62 words per minute.

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Given

• Equation y = 62x

Part A

This is a proportional relationship since it is of the same form:

• y = kx, where k-constant of proportionality

Part B

The constant k represents the rate of change, so:

• k = 62 words per minute