Rate of Change

The table shows the cost of long distance calls as a function of the number of minutes used. Is there a constant rate of change? Explain and interpret its meaning.

• Yes, 10 calls per minute

• Yes, $.10 per minute

• Yes, $.40 per minute

• Not a constant rate

Determine the Constant Rate of Change?

• $250.00 per day

• $333.33 per day

• -$250.00 per day

• -$333.33 per day

Does this show a constant rate of change?
g = 2.4t

• Yes

• No

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

Is the graph proportional or non proportional?

• proportional

• non proportional

What is rate of change?

• The amount of money you get back when you overpay for something.

• Describes how one quantity changes in relation to another quantity

• The amount of one quantity multiplied by another quantity

• How much someone changes over their lifetime

Find the rate of change

• 1

• 2

• 11

• Not a constant slope/Non-Linear

Analyze the point (3, 27). What does the point represent? 

• The point (3,27) represents 27 shirts for $3. 

• The point (3,27) represents $27 for 3 shirts. 

Find the rate of change

• 1

• 2

• 11

• slopeNot a constant slope/Non-Linear

Calculate the rate of change.

• 1

• 2

• 11

• Not a constant slope/Non-Linear