Modeling with Rates and Initial Value

Alex starts with $150 in their bank account. Each week they are going to save $20 that they earn for babysitting their sister.

What equation represents the story?

What is the initial value?

• 1

• 2

• 9

• 11

What is the rate of change in the equation?
y=8x+6

• 8

• 6

What is the rate of change for the following graph?

• 80

• 20

• 40

• 160

Find the rate of change

• 3

• -3

• 20

• Not a constant slope/Non-Linear

Find the rate of change.

• -2 minutes per gallon

• -20 minutes per gallon

• -2 gallons per minute

• -20 gallons per minute

What is the initial value in this equation?
y=8x+6

• 8

• 6

Tim bought a new phone.  He paid $125 on the day of purchase, then $50 per month until it was paid off. What is the rate of change in this situation?

• 50

• 125

Find the rate of change

• 1

• 2

• 11

• Not a constant slope/Non-Linear

Which company shows a greater rate of change?

• Water's Edge Rafts

• Ryan's Rafts