Envisions Math Topic 2 Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If the ratio of apples to oranges is 3:4, how many oranges are there if there are 15 apples?

Back

20 oranges.

Front

What is a constant of proportionality?

Back

The constant of proportionality is the constant value that relates two proportional quantities, often represented as k in the equation y = kx.

Tags

CCSS.7.RP.A.2B

Front

How do you find the constant of proportionality from a table of values?

Back

Divide the value of y by the value of x for any pair of corresponding values.

Tags

CCSS.7.RP.A.2B

Front

What does it mean if two quantities have a proportional relationship?

Back

It means that as one quantity increases or decreases, the other quantity changes at a constant rate.

Tags

CCSS.7.RP.A.2A

Front

On a map, if 1 inch equals 10 miles, how far apart are two cities that are 7 inches apart on the map?

Back

70 miles.

Tags

CCSS.6.RP.A.3B

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

Find the unit rate for 72 ounces for 12 servings.

Back

6 ounces per serving.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the equation of a line in slope-intercept form?

Back

The equation is y = mx + b, where m is the slope and b is the y-intercept.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Front

Does the equation y = 3x + 2 show a proportional relationship between x and y?

Back

No, the graph does not pass through the origin.

Tags

CCSS.7.RP.A.2D