Proportional Relationships and Rate of Change

Does the table represent a proportional relationship?

• Yes.

• No.

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.

What is the constant rate of change?

• No Constant Rate of Change

• $80 per month.

• $82 per month.

• $41 per month.

What makes a graph proportional?

• Straight line

• The line goes through the origin

• Curvy line

• Straight line and the line goes through the origin

Does this table show a proportional relationship?

• Yes

• No

Does the table represent a proportional relationship?

• Yes.

• No.

The table shows the cost of long distance calls based on the number of minutes used. Is there a constant rate of change, and if so what is it?

• Yes, 10 calls per minute

• Yes, $.10 per minute

• Yes, $.40 per minute

• Not a constant rate

• Taylor can write 6 words per minute
• Taylor can write 25 words per minute
• Taylor can write 50 words per minute
• Taylor can write 150 words per minute

Does the graph represent a proportional relationship?

• yes

• no

What is the equation that represents a proportional relationship?

• k = x/y

• k = y/x

• x = ky

• y = kx