Constant Rate of Change Equations

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

Which company shows a greater rate of change?

• Water's Edge Rafts

• Ryan's Rafts

• 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

What is the constant rate of change between the quantities in the table?

• -20 gal per minute

• -2 gal per minue

• 2 gal per minute

• 20 gal per minute

Determine the Constant Rate of Change?

• -10 ft per second

• 15 ft per second

• 10 ft per second 

• -15 ft per second

• Proportional, Linear, Negative
• Non-Pro, Linear, Negative
• Proportional, Linear, Positive
• Non-Pro, Linear, Positive

The temperature at noon was 88°F. By 4 P.M., the temperature was 72°F. Find the constant rate of change of the temperature.

• decresed by 4 degrees per hour

• increased by 4 degrees per hour

• decreased by 1.5 degrees per hour

• increased by 8 degrees per hour

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. 

Write an equation for this situation.

• y=9.75x

• y=19x

• y=19.25x

• y=9.5x

At what rate did the rain fall?

• 2 cm per hour

• ¹/₄ cm per hour

• ¹/₂ cm per hour

• 4 cm per hour