The table shows the outputs y for different inputs x:

Input
(x)
5 6 7 8

Output
(y)
2 5 8 11

Part A: Do the data in this table represent a function? Justify your answer. (3 points)
Part B: Compare the data in the table with the relation f(x) = 2x + 13. Which relation has a greater value when x = 7? (2 points)
Part C: Using the relation in Part B, what is the value of x if f(x) = 75? (5 points)

Question

The table shows the outputs y for different inputs x:




Input
(x)
5 6 7 8 


Output
(y)
2 5 8 11 


Part A: Do the data in this table represent a function? Justify your answer. (3 points)
Part B: Compare the data in the table with the relation f(x) = 2x + 13. Which relation has a greater value when x = 7? (2 points)
Part C: Using the relation in Part B, what is the value of x if f(x) = 75? (5 points)

anonymous · Answer

I really only need help with part b I have been stuck for an hour now

tkhunny · Answer

Have you considered substituting = 7 and see what you get, and then comparing it to 8?

anonymous · Answer

I'm not sure what you mean

tkhunny · Answer

You'll have to do better than that.

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usukidoll · Answer

nice direct answer and explanation... so epic. :/

tkhunny · Answer

x=11?  Are we reading the same problem?

crystal_bliss · Answer

ooops that was for another question. sorry i'm new so excuse me for that.

usukidoll · Answer

ah that's ok :)