Lesson 17 Preview

How can you tell if a graph shows a proportional relationship? (Select all that apply)

• Goes through the origin

• Linear

• Curved

• Decreasing

• $30 saved each week

• $145 saved each week

• $30 already saved

• $145 already saved

• $30 saved each week

• $145 saved each week

• $30 already saved

• $145 already saved

A tank of water was filled to capacity. At noon, Hailey started draining water at a constant rate, shown by the graph.

What does the initial value represent?

• The tank has a capacity of 8 gallons.

• The tank takes 8 hours to drain.

• The tank has a capacity of 2 gallons.

• The tanks takes 2 hours to drain.

A tank of water was filled to capacity. At noon, Hailey started draining water at a constant rate, shown by the graph.

What does the rate of change represent?

• Every 1 hour, the tank drains 2 gallons.

• After 1 hour, the tank drains 2 gallons.

• Every 2 hours, the tank drains 1 gallon.

• After 2 hours, the tank drains 1 gallon.

The cost of a hiking trip to Mount Kilimanjaro includes an entrance fee plus a constant fee for every mile.

What does the initial value represent?

• $11 is the entrance fee.

• $11 for every mile hiked.

• $1.50 is the entrance fee.

• $1.50 for every mile hiked.

The cost of a hiking trip to Mount Kilimanjaro includes an entrance fee plus a constant fee for every mile.

What does the rate of change represent?

• $11 is the entrance fee.

• $11 for every mile hiked.

• $1.50 is the entrance fee.

• $1.50 for every mile hiked.

Which table has a greater rate of change?

• Table A with rate of 5.

• Table B with rate of 4.

• Table A with rate of 4.

• Table B with rate of 5.

Which graph has a greater rate of change?

• Line A with rate of 1.

• Line B with rate of -1

Which equation has a greater initial value?

• Equation A with an initial value of 15.

• Equation B with an initial value of 15.

• Equation A with an initial value of 6.

• Equation B with an initial value of 6.