7th Grade Midterm Practice 2023

Front

What is the constant of proportionality in the equation y = kx?

Back

The constant of proportionality (k) is the ratio of y to x, which remains constant for proportional relationships.

Front

How do you express the constant of proportionality when given a table of values?

Back

You express it as y = kx, where k is the unit rate derived from the values.

Front

What is the unit rate?

Back

The unit rate is the ratio of two measurements in which the second measurement is 1. It helps to find the constant of proportionality.

Front

If 5 pencils cost $2.15, what is the price per pencil?

Back

$0.43 per pencil.

Front

How do you calculate the change in temperature?

Back

Subtract the initial temperature from the final temperature.

Front

If the temperature changes from -8 degrees to 27 degrees, what is the change?

Back

The change is 35 degrees.

Front

What does a rate of 2 cm per hour indicate?

Back

It indicates the speed at which rain is falling, measured in centimeters per hour.

Front

What is the formula to find the constant of proportionality from a ratio?

Back

k = y/x, where y is the dependent variable and x is the independent variable.

Front

What is a proportional relationship?

Back

A proportional relationship is one where two quantities maintain a constant ratio.

Front

How can you find the unit rate from a given ratio?

Back

Divide the first quantity by the second quantity.