Drag each object to show whether earnings are proportional to time in the situation represented.
A person who earns 2% simple interest
on a savings account each year
Line graph. X-axis labeled Time (hours) with number line of 10, 70. Y-axis labeled Earnings (dollars) with number line of 50, 500. Diagonal line in upper quadrant has slight dip near halfway point.
A tutor charging $30 per hour
for 3 hours
Earnings (dollars) Time (minutes)
1.25 10
2.50 20
3.75 30
A worker earning an hourly wage
A contractor charging a house call
fee and then an hourly labor rate
Earnings Are Proportional to Time
Earnings Are NOT Proportional to Time
Not Enough Information
Earnings Are Proportional to Time
(Earnings increase with the amount of time worked or the amount of time the savings account has been open)
A person who earns 2% simple interest on a savings account each year:
- Earnings are proportional to time.
A tutor charging $30 per hour for 3 hours:
- Earnings are proportional to time.
- Earnings (dollars) - Time (minutes):
- 1.25 : 10
- 2.50 : 20
- 3.75 : 30
A worker earning an hourly wage:
- Earnings are proportional to time.
- However, the specific rate of the hourly wage is not provided, so the exact relationship cannot be determined.
A contractor charging a house call fee and then an hourly labor rate:
- Earnings are NOT proportional to time.
- The contractor charges a fixed house call fee, which is not dependent on time, followed by an hourly labor rate, which is dependent on time. Therefore, the earnings are not directly proportional to time.
Note: In some cases where information is missing or not provided, it may be difficult to determine the exact relationship between earnings and time.