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

can somebody help me with part B

triciaal · Answer

you have a function when there is only one output value for a given input

unklerhaukus · Answer

The column corresponding to x =7 in the table,
                 is here
                         |
Input                 |
(x)	5	6	[7]	8
Output
(y)	2	5	[8]	11
                         |
                         |

The value of the function: f(x) = 2x + 13 , 
evaluated at x=7  

is   f(7) = 2(7) + 13 =

triciaal · Answer

Which relation has a greater value when x = 7? 
as shown above 
which is greater 8 or 2(7) + 13 ?

triciaal · Answer

C) what is the value of x if f(x) = 75
f(x) = 2x + 13 = 75   solve for x

triciaal · Answer

do you know how to solve for x?