Checking Proportional Relationships

What method of checking a proportion is shown here?

• multiply/divide across (between different ratios)

• multiply/divide up and down (between two values in the same ratio)

• change to decimal form

• cross multiply

• simplest form

What method of checking a proportion is shown here?

• multiply/divide across (between different ratios)

• multiply/divide up and down (between two values in the same ratio)

• change to decimal form

• cross multiply

• simplest form

Is this proportion correct? (Are the ratios equivalent?)

• Yes, they form a true proportion.

• No, the ratios are not equivalent, so the proportion is not true.

What is a proportion?

• an equation stating that two ratios are equal to each other

• a comparison between two things or numbers using division

• the thing on the front of an old fashion plane

• mixed numbers

Check the statement(s) which is/are true about the given figure.

• The first two rectangles are proportional

• All the given rectangles are proportional

• The Green and the Red rectangles are proportional

• The Yellow and Red rectangles are NOT proportional

• The perimeters and sides of the Green and Yellow rectangles are proportional

Which situation represents a proportional relationship?

Select the correct answer ○ in each row.

The table is​ ​ (a)   , because it ​ (b)   a constant ratio.

If so, what is the constant of proportionality?​ (c)  

• non-proportional

• proportional

• does not have

• has

• no constant

• k=14

Answer explanation

A proportional relationship means that two quantities maintain a constant ratio. In this case, the relationship does not exhibit a constant ratio, hence the answer is No.

Is the given table a proportional relationship? If so, what is the constant?

• Yes; 1/3

• Yes; 3

• Yes; 5

• No

Does the table represent a proportional relationship?

Which is NOT proportional?

• 2/7 = 10/35

• 1/12 = 2/20

• 10/12 = 5/6

• 25/35 = 5/7