Proportional vs Nonproportional Ratios

Which one of these is the constant of proportionality?

• 2

• 30

• 1/15

• 15

Write an equation for this situation:

The cost of renting a kayak is just $20 an hour.

• y = 10x

• k = 20

• y = 20x

This equation shows a proportional relationship

y = 5x

• True

• False

• mostly equal

• all equal

What is the constant of proportionality of this graph?

• 10

• 15

• 20

• 30

Does this equation show a proportional relationship?

y = 3x - 2

• yes

• no

Proportional or Nonproportional

• Proportional (straight line through origin)

• Non-Proportional

When graphing a relationship on the coordinate grid ... The line is straight and it passes through the origin, therefore we have a ______________.

• Proportion

• Party

• Porcupine

• Positive number

How can you use the unit rate to create an equation for a relationship? (Remember the unit rate is the same as the constant of proportionality)

• y=abc+def+ghi

• y=5$3

• y=constant of proportionality(x)

• y=305x + 88 -4 abc

When graphing a relationship that is in a table, the relationship is proportional if, and only if, (select TWO)

• The line is curvy and pretty.

• The line is straight.

• The line passes through the origin.

• The line does not pass through the origin.