Evaluating Proportional Relationships

Is the graph proportional or non proportional?

• proportional

• non proportional

Find the unit rate:  $3.60 for 3 pounds of apples. How much does it cost for 1 pound of apples?

• $1.00 per pound

• $3.60 per pound

• $1.20 per pound

• $1.10 per pound

Why does this graph show a non-proportional relationship?

• Because it is proportional

• It goes through the origin

• It does not go through the origin

• It is a straight line

Is the graph proportional or non proportional?

• proportional

• non proportional

• y = 1/5x

• y = 5x

• y = 1/2x

Write the equation of the proportional relationship using the format y = kx.

What is the constant of proportionality? Use the format k = 2.

Write the equation of the graph. Use the format y = kx.

Is the graph proportional?

• Yes

• No

What is the constant of proportionality?

• k = 3

• k = 1/3

• k = 3x

• k = 1/3x