Envisions Math Topic 2 Review

Front

What is the equation to calculate the total cost y in dollars for x posters if the cost per poster is $9.25?

Back

y = 9.25x

Front

Which graph shows a relationship that is not proportional?

Back

Graph A

Front

How can you determine if a table represents a proportional relationship?

Back

If the ratio of the values remains constant, it is proportional.

Front

Write the equation to find the total cost y in dollars for x sheets of stickers if each sheet costs $2.45.

Back

y = 2.45x

Front

If the ratio of boys to girls in a class is 2:3 and there are 25 girls, how many boys are there?

Back

17 boys

Front

What does it mean for a relationship to be proportional?

Back

A proportional relationship means that two quantities maintain a constant ratio.

Front

If y = 2.45x, what does the number 2.45 represent?

Back

The cost per sheet of stickers.

Front

How do you calculate the total cost for multiple items using a unit rate?

Back

Multiply the unit rate by the number of items.

Front

What is a proportional relationship in terms of a graph?

Back

A straight line that passes through the origin.

Front

If a table shows values of x and y, how can you check if they are proportional?

Back

Calculate the ratio y/x for each pair; if they are all the same, they are proportional.