I have a graph that states evaluate f(1)

Question

 I will try to explain it as best as possible.  Just image a table graph type. 

 

It says, Complete the table. then evaluate f(1)

 

The first table 

 

 x                    0        1        2         3       4

f(x)= 2/x-1       ?        ?        ?         ?        ?

Table #2


x                  0       1       2         3        4

f(x)=2/x-1    ?        ?       ?         ?         ?


(type an integer or a fraction.  type N if the function is undefined)

 

Evaluate f(1). Select the correct choice and fill in the box with you choice

 

A.  f(1)=  ????

(type an integer or a fraction)

 

B. The function is undfined 

Answer 1

f(1) means what is the Y value of a function of x when x = 1.

so you have a function (a particular type of "graph" with y and x in it,

where you only get one y value for each particular x you choose).

 

from your tables, when x = 1, what is y?

that is all it is asking. read the (x,y) table.

 

table 1: 

f(x) = (2 /x) -1 , so put 1 wherever you see x.

(2)/(1)   - 1 = 2 - 1 = 1.

so y = 1 when x = 1, so the point (1,1) is in your table and on the graph.

 

If instead you meant f(x) = 2/(x-1) then evaluate at x = 1, means 

2/(1-1) = 2 / 0 = undefined. so it depends on if you meant a fraction minus a

whole number or if you meant just a fraction. since you did not use parenthesis

I cannot tell.