Open Up - Grade 8 - Mathematics - Unit 5 - Lesson 7
By Formative Library
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Last updated almost 3 years ago
7 Questions
1
1.
The equation and the tables represent two different functions. Use the equation b=4a-5 and the table to answer the questions. This table represents c as a function of a.
When a is -3, is b or c greater?
8.F.3
8.F.2
1
2.
The equation and the tables represent two different functions. Use the equation b=4a-5 and the table to answer the questions. This table represents c as a function of a.
When c is 21, what is the value of a? What is the value of b that goes with this value of a?
8.F.3
8.F.2
1
3.
The equation and the tables represent two different functions. Use the equation b=4a-5 and the table to answer the questions. This table represents c as a function of a.
For what values of a do we know that c is greater than b?
8.F.3
8.F.2
1
4.
Match each function rule with the value that could not be a possible input for that function.(match 1 number per function.)
0
4
3
1
-4
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
8.F.3
8.F.2
1
5.
Elena and Lin are training for a race. Elena runs her mile a constant speed of 7.5 miles per hour.
Lin’s times are recorded every minute:
Who finished their mile first?
8.F.3
8.F.2
1
6.
Elena and Lin are training for a race. Elena runs her mile a constant speed of 7.5 miles per hour.
Lin’s times are recorded every minute:
This is a graph of Lin’s progress. Draw a graph to represent Elena’s mile on the same axes.(Show Your Work)
For these models, is distance a function of time? Is time a function of distance? Explain how you know.(Short Answer)
8.F.3
8.F.2
1
7.
Find a value of x that makes the equation true:(If your answer is a fraction leave it as one.)
-(-2x+1)=9-14x
8.F.3
8.F.2
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