Things to Learn

  • Examine situations to decide whether two quantities are proportional to each other by checking for a constant multiple between measures of `x` and measures of `y` when given in a table.
  • Study examples of relationships that are not proportional in addition to those that are.

You have been hired by your neighbors to babysit their children on Friday night. You are paid $8 per hour. Use the Desmos Calculator to complete the table relating your pay to the number of hours you worked.

Babysitting for the Neighbors

Lesson Summary
A type of quantity is proportional to a second if there is a constant number such that the product of each measure of the first type and the constant is equal to the corresponding measure of the second type.
Steps to determine if quantities in a table are proportional to each other:
1. For each row (or column), calculate B/A where A is the measure of the first quantity, and B is the measure of the second quantity.
2. If the value of B/A is the same for each pair of numbers, then the quantities in the table are proportional to each other.
Exercises and Practice
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