Select all the functions whose graphs include the point (16,4).
This graph shows the temperature in Diego’s house between noon and midnight one day. Select all true statements.
Temperature is a function of time
The lowest temperature occurred between 4:00 and 5:00.
The temperature was increasing between 9:00 and 10:00.
The temperature was 79 degrees twice during the 12-hour period.
There was a four-hour period during which the temperature did not change.
This table shows a linear relationship between the amount of water in a tank and time.
Which of these statements is true?
The water in the tank is increasing at a rate of 2 gallons per minute.
The water in the tank is increasing at a rate of 10 gallons per minute.
The water in the tank is decreasing at a rate of 2 gallons per minute.
The water in the tank is decreasing at a rate of 10 gallons per minute.
Elena goes for a long walk. This graph shows her time and distance traveled throughout the walk. Which interval represents her fastest speed?
0 to 20
20 to 30
30 to 35
35 to 40
Elena goes for a long walk. This graph shows her time and distance traveled throughout the walk. What was her fastest speed, in meters per second?
2 meters per second
0.4 meters per second
4 meters per second
2.5 meters per second
Lin counts 5 bacteria under a microscope. She counts them again each day for four days, and finds that the number of bacteria doubled each day—from 5 to 10, then from 10 to 20, and so on.
Is the number of bacteria a function of the number of days?
yes
no
Lin counts 5 bacteria under a microscope. She counts them again each day for four days, and finds that the number of bacteria doubled each day—from 5 to 10, then from 10 to 20, and so on.
Is this function linear? Explain how you know.
Yes, there are no repeated inputs
Yes, the rate of change is constant
No, the rate of change is not constant.
Not enough info to decide.
Using the table below, how much does A-Plus Plumbing cost for each hour of work?
60
80
240
120
Using the table below, how much does A-Plus Plumbing charge for the one-time fee?
60
80
240
120
How much does Quality Plumbing charge for each hour of work?
$25
$50
$100
$150
$200
How much does Quality Plumbing charge for the one time fee?