Identify Proportional Relationship

What is the constant of proportionality?

• k=0.7

• k=1.25

• k=2

• k=1.5

What is the equation of the graph? (Hint: find the constant of proportionality.)

• y = 5x

• y = 10x

• y = 1x

What is the unit rate for the rain fall?

• 2 cm per hour

• 1 cm per hour

• ¹/₂ cm per hour

• 4 cm per hour

Match the correct equation to the graph

• y = 90x

• y = 9x

• y = 10x

• y = 2x

What does the point (2, 94) represent in this situation?

• Every week, they earn $94.

• After 94 weeks, they save $2.

• After 1 week, they save $47.

• After 2 weeks, they save $94.

Which statement matches the graph?

• Emma can type 45 words per minute.

• Emma can type 25 words per minute.

• Emma can type 50 words per minute.

• Emma can type 150 words per minute.

Is this graph proportional? How do you know?

• Yes, it is a straight line

• No, it is not a straight line

• No, it does not pass through the origin

• Yes it is straight line, passing through (0, 0)

Does this graph represent a proportional relationship?

• Yes, because the line is pretty.

• No, because the line goes through the origin.

• Yes because the line goes through the origin.

• No, because the graph is non-proportional.

True/False: The point (2,1) means to mix 1 quart of green paint with 2 quarts of red paint.

• True

• False

True/False: A proportional relationship graph always passes through the origin.

• True

• False