Week 17 Practice Problems

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other is constant. For example, if you double one quantity, the other quantity also doubles.

Front

What is a non-proportional relationship?

Back

A non-proportional relationship is a relationship where the ratio of one quantity to another is not constant. For example, if a fixed fee is added to a variable cost, like a bike rental fee, it creates a non-proportional relationship.

Front

What does the equation C=5h+15 represent?

Back

This equation represents the total cost (C) of renting a bicycle, where h is the number of hours rented. The $15 is a fixed fee, and $5 is the cost per hour.

Front

How do you convert minutes to hours in a speed problem?

Back

To convert minutes to hours, divide the number of minutes by 60. For example, 10 minutes is equal to 10/60 = 1/6 hours.

Front

What is the formula to calculate distance when speed and time are known?

Back

The formula is d = rt, where d is distance, r is rate (speed), and t is time.

Front

If Alex rides 1 mile in 10 minutes, what is his speed in miles per hour?

Back

His speed is 6 miles per hour, calculated as (1 mile / (10 minutes * (1 hour / 60 minutes))) = 6 mph.

Front

What is the equation for distance traveled at a constant speed?

Back

The equation is d = rt, where d is distance, r is speed, and t is time.

Front

What does the equation d=60t represent?

Back

This equation represents the distance (d) Sarah travels when driving at a constant speed of 60 miles per hour for t hours.

Front

How do you determine who walked faster in a marathon?

Back

To determine who walked faster, compare the speed of each participant, which can be calculated by dividing distance by time.

Front

What is a constant speed?

Back

Constant speed means that an object covers equal distances in equal intervals of time, regardless of how small those intervals are.