Compare Proportional Relationships Practice

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Question
Use the table and image to answer the question.

Employee 1
Earnings per Hour
Hours Earnings
1 10
2 20
3 30
A line graph is titled as Employee 2, Earnings per Hour. The x-axis is labeled Hours ranging from 0 to 6 in increments of 1. The y-axis is labeled Earnings in dollars, ranging from 0 to 80 in increments of 5. A solid line joins four plotted points. The coordinates of the plotted points are as follows: left parenthesis 0 comma 0 right parenthesis, left parenthesis 1 comma 15 right parenthesis, left parenthesis 3 comma 45 right parenthesis, and left parenthesis 5 comma 75 right parenthesis.

The proportional relationship for the earnings and hours worked for Employee 1 is displayed in the table. The proportional relationship between the earnings and hours worked for Employee 2 is displayed in the graph. What is the equation that represents the proportional relationship between the earnings and hours worked for Employee 1 and Employee 2?

1 answer

To find the equations representing the proportional relationships for Employee 1 and Employee 2, we need to analyze the information provided.

Employee 1

From the table, we have:

  • When hours = 1, earnings = 10
  • When hours = 2, earnings = 20
  • When hours = 3, earnings = 30

As we can see, if we divide the earnings by the hours, we find that:

  • \( \frac{10}{1} = 10 \)
  • \( \frac{20}{2} = 10 \)
  • \( \frac{30}{3} = 10 \)

Since the ratio is constant (10), we can write the equation for Employee 1 as follows: \[ E_1 = 10H \] Where \( E_1 \) represents the earnings of Employee 1 and \( H \) represents the hours worked.

Employee 2

From the graph, we observe the following points:

  • Coordinates: (0, 0), (1, 15), (3, 45), (5, 75)

We can calculate the rate of earnings per hour for Employee 2:

  • For 1 hour, earnings = 15
  • For 3 hours, earnings = 45
  • For 5 hours, earnings = 75

If we divide the earnings by the hours:

  • \( \frac{15}{1} = 15 \)
  • \( \frac{45}{3} = 15 \)
  • \( \frac{75}{5} = 15 \)

Again, since the ratio is constant (15), we can write the equation for Employee 2 as: \[ E_2 = 15H \] Where \( E_2 \) represents the earnings of Employee 2.

Summary of the Equations:

  • For Employee 1: \[ E_1 = 10H \]
  • For Employee 2: \[ E_2 = 15H \]

These equations represent the proportional relationships between earnings and hours worked for both employees.