Question

The table shown below represents a function. Which of the following values could not be used to complete the table?



a.-20
b.-15
c.-5

Answer 1

The answer to the question is option is c.-5

Answer 2

Answer:

(c) -5  

Step-by-step explanation:

From the definition of function, we know that each input has only one output.

Means that for each and every value of x, there will be a single value in y.

Two same values of x can not have different outputs in y.

Hence, when x = -10, y = 5

x = -25, y = 10

x = -5, y= 15

when y = 20, we need to find x. Since, the table represents a function

Therefore, x can take value -20,-15 but not -5 because when x= -5, y = 15

Again x = -5 will not give y = 20.

Hence, option (c) is correct