Proportional Tables Equations

Write an equation for this situation.

• y=9.75x

• y=19x

• y=19.25x

• y=9.5x

Craig earns extra money as a lifeguard. He earns $37 for 4 hours and $64.75 for 7 hours.  What is the constant of proportionality? 

• $37

• $64.75

• $9.25

• $18.50

The cost of 4 pounds of grapes is $24.36. What is the constant of proportionality the relates cost in dollars, y, to the number of pounds of grapes, x?

• 6.09

• 20.36

• 8.12

• 28.36

Write an equation for this relationship.

• d=18.50c

• c=18.50d

• c=22.50d

• c=22d

Which equation shows a proportional relationship between x and y?

• y = 3x + 9

• y = 1/2x

• y = 1/2x - 2

• y = x²

READ THE SIGN VERY CAREFULLY!!! Write an equation for this relationship.

• y=10.99x

• y=22.98x

• y=22x

• y=21.98x

If the relationship in the table is proportional, write its equation.

• The relationship is not proportional

If the relationship in the table is proportional, write its equation.

• The relationship is not proportional

Find the constant of proportionality on this table of values.

• k=3

• k=1

• k=0

• k=4

What is the equation y=kx for the table?

• y=1/3x

• y=3x

• y=5x

• y=1/5x