Grade 7 – Ch 5 – Proportional Relationships Test Review

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 quantity is constant.

Front

What is the equation of a proportional relationship?

Back

The equation of a proportional relationship can be written in the form y = kx, where k is a constant.

Front

Identify a non-proportional equation: y = 5x - 7 or y = 3x.

Back

y = 5x - 7 is a non-proportional equation because it does not pass through the origin.

Front

What does the scale 1cm = 8km mean?

Back

It means that every 1 centimeter on the map represents 8 kilometers in actual distance.

Front

If two cities are 24cm apart on a map with a scale of 1cm = 8km, what is the actual distance?

Back

The actual distance is 192 km.

Front

How do you solve for x in an equation?

Back

To solve for x, isolate x on one side of the equation using inverse operations.

Front

What is the height of a tree if a 2-meter fence post casts a 5-meter shadow and the tree casts a 108-meter shadow?

Back

The height of the tree is 43.2 meters.

Front

What characterizes a proportional graph?

Back

A proportional graph is characterized by a straight line that passes through the origin (0,0).

Front

What is the constant of proportionality?

Back

The constant of proportionality is the constant factor (k) in the equation y = kx.

Front

How can you determine if two ratios are proportional?

Back

Two ratios are proportional if their cross products are equal.