Proportions Intro

One bunch of seedless black grapes costs $2. How many bunches of seedless black grapes can you buy for $16?

• 8

• 20

• 22

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.

The ratio of the number of teeth on Gear A to the number of teeth on Gear B is 5 to 12.  How many teeth are on Gear B if there are 15 teeth on Gear A?

• 3

• 10

• 36

• 48

Write the equation for the table given

• y = 1/3x

• y = 3x

• y = 3

• x = 3y

 Is this table proportional or non-proportional?

• Proportional

• Non-Proportional

• 4

• C.O.P.

Does this graph represent a proportional relationship?  

• No, because it doesn't pass through the origin.

• Yes, because it doesn't pass through the origin.

• Yes, because it intersects the y axis.

• No, because it intersects the x axis.

Is this table proportional?

• yes because it will go through the origin and is a straight line

• no because the C.O.P. for each line is different

• yes because it increases by 1

• no because there is no origin

Solve for x 

• x = 6

• x = 25

• x = 28

• x = 17

Solve for x

• x = 19.6

• x = 5/98

• x = 101/5

Solve the proportion.

• k=5

• k=3.3333333

• k=60

• k=90