Unit 1 Review

Front

What is the constant of proportionality in a proportional relationship?

Back

The constant of proportionality is the ratio between two proportional quantities. For example, if the relationship is represented as y = kx, then k is the constant of proportionality.

Front

Which graph represents a proportional relationship?

Back

A graph that passes through the origin (0,0) and has a straight line indicates a proportional relationship.

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity. For example, if a car travels 150 miles in 3 hours, the unit rate is 50 miles per hour.

Front

What is the formula for finding the radius of a circle?

Back

The radius of a circle is half of the diameter. If the diameter is d, then the radius r is given by r = d/2.

Front

How do you find the unit rate from a ratio?

Back

Front

What is the relationship between the radius and diameter of a circle?

Back

The diameter of a circle is twice the length of the radius. Therefore, if the radius is r, the diameter d is given by d = 2r.

Front

How do you calculate the time taken to gain weight at a constant rate?

Back

To calculate the time taken to gain weight at a constant rate, divide the total weight to be gained by the weight gained per unit time.

Front

What does it mean for two quantities to be proportional?

Back

Two quantities are proportional if they maintain a constant ratio to each other. This means that as one quantity increases, the other quantity increases at a consistent rate.

Front

What is the significance of the origin in a graph of proportional relationships?

Back

The origin (0,0) is significant in a graph of proportional relationships because it indicates that when one quantity is zero, the other quantity is also zero.

Front

How can you identify a proportional relationship from a table of values?

Back

A proportional relationship can be identified from a table of values if the ratio of the corresponding values remains constant.