Unit 3 Test Math 8

Front

What is the constant of proportionality in the equation y = ½x?

Back

1/2

Front

Which equation matches the graph of a line with a negative slope and a y-intercept of 5?

Back

y = -0.5x + 5

Front

What does it mean if a relationship is not proportional?

Back

It means that the ratio of y to x is not constant.

Front

If a table shows values of x and y, how do you determine the missing value if the relationship is proportional?

Back

Use the constant of proportionality to find the missing value.

Front

What is the constant of proportionality if k = 2x?

Back

k = 2

Front

How do you identify the constant of proportionality from a graph?

Back

Look for the slope of the line.

Front

What is the definition of proportionality in mathematics?

Back

A relationship where two quantities maintain a constant ratio.

Front

If y = kx, what does k represent?

Back

The constant of proportionality.

Front

What is the constant of proportionality in the equation y = 3x?

Back

3

Front

How can you tell if a relationship is proportional from a set of data points?

Back

If the ratio of y to x is the same for all points.