Lesson 7: Practice Problems
Problem 1
The equation and the tables represent two different functions. Use the equation
When
is -3, is or greater? When
is 21, what is the value of ? What is the value of that goes with this value of ? When
is 6, is or greater? For what values of
do we know that is greater than ?
Problem 2
Elena and Lin are training for a race. Elena runs her mile at a constant speed of 7.5 miles per hour.
Lin’s total distances are recorded every minute:
time (minutes) | |||||||||
---|---|---|---|---|---|---|---|---|---|
distance (miles) |
Who finished their mile first?
This is a graph of Lin’s progress. Draw a graph to represent Elena’s mile on the same axes.
For these models, is distance a function of time? Is time a function of distance? Explain how you know.
Problem 3 From Unit 5 Lesson 2
Match each function rule with the value that could not be a possible input for that function.
3 divided by the input
Add 4 to the input, then divide this value into 3
Subtract 3 from the input, then divide this value into 1
3
4
-4
0
1
Problem 4 From Unit 4 Lesson 4
Find a value of