Writing and interpreting functions

Iris founded a new town, Iristown. The population of Iristown after x years can be modeled by the function p(x) = 1500(1.1)^x. On average, how fast is the population increasing between years 0 and 10?

• 212.12 people/year

• 251.11 people/year

• 239.06 people/year

• 391.29 people/year

The table shows the distance Tommy ran in different minutes.  During which time interval did the salary increase at the greatest rate?

• 28 - 42
• 42 - 64
• 64 - 78
• 78 - 97

Over what interval is this function constant?

• -5 < x < ∞
• -3 < x < 4
• 4 < x < ∞
• -5

A variable that stays the same is called....

• control

• independent variable

• dependent variable

• responding variable

Over which interval of time is this person returning home?

• A

• B

• C

• D

• E

The graph represents linear data. Which statement is incorrect?

• The quantity depends on the price.

• The price is the independent variable.

• The price is a function of the quantity.

• The larger the quantity, the higher the price.

What is the y intercept of the table?

• 7

• 2

• 9

• 5

Which segment did Anthony travel fastest?

• 0 to 3 minutes

• 3 to 4 minutes

• 4 to 7 minutes

• 7 to 9 minutes

What is the speed of the object at 3 hours?

• 0 mi/hr

• 24 mi/hr

• 2.5 mi/hr

• 6 mi/hr

Which story matches the graph?

• An insect starts on the ground. It starts climbing a tree. It rests for a minute. Then it climbs up the tree a little faster. It falls down a few centimeters and decides to rest in that spot.

• An insect starts on the ground. It climbs up a tree at a continuous rate for a total of 5 minutes. Then it climbs all the way back down to the ground and crawls at a steady pace.