Open Up Grade 7 Unit 3 Post Test

Front

What is the diameter of a circle?

Back

The diameter is the distance across a circle through its center, equal to twice the radius.

Front

What is the radius of a circle?

Back

The radius is a line segment from the center of the circle to any point on its circumference.

Front

What does it mean for a relationship to be proportional?

Back

A relationship is proportional if it can be represented by a straight line that passes through the origin on a graph.

Front

What is the formula for a proportional relationship?

Back

The formula is y = kx, where k is the constant of proportionality.

Front

What is the Constant of Proportionality?

Back

The Constant of Proportionality (k) is the constant factor that relates two proportional quantities.

Front

How do you find the diameter if you know the radius?

Back

The diameter is found by multiplying the radius by 2 (Diameter = 2 * Radius).

Front

What is the relationship between diameter and radius?

Back

The diameter is always twice the length of the radius.

Front

What does it mean for a line to touch the origin in a graph?

Back

It means that the line crosses the point (0,0), indicating a proportional relationship.

Front

What is an example of a proportional relationship in real life?

Back

An example is the relationship between distance and time when traveling at a constant speed.

Front

How can you determine if two quantities are proportional?

Back

Two quantities are proportional if their ratio remains constant.