The table shows the outputs y for different inputs x:

Input
(x) 3 7 11 15
Output
(y) 4 6 8 10

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) = 5x – 21. Which relation has a greater value when x = 11? (2 points)
Part C: Using the relation in Part B, what is the value of x if f(x) = 99? (5 points)

Question

The table shows the outputs y for different inputs x:


Input
(x)	3	7	11	15
Output
(y)	4	6	8	10


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) = 5x – 21. Which relation has a greater value when x = 11? (2 points)
Part C: Using the relation in Part B, what is the value of x if f(x) = 99? (5 points)

anonymous · Answer

for A, functions don't repeat x-values. So if all the x's are different it's a function.

anonymous · Answer

for B, you need to find f(11) to make the comparison. Plug in 11 for x and simplify.
$$f(11) = 5(11)-21$$

anonymous · Answer

and for c?

karatechopper · Answer

If f(x)=99 then plug that into your given equation in B f(x)=5x-21

karatechopper · Answer

Solve for x

anonymous · Answer

I'm confused donot how, I'm not good at math

anonymous · Answer

its fine i have the answers. thanks

anonymous · Answer

does the 99 replace both x