11 Marks: --/7 True or False: The following relation represents a function. x 1

Question

11
Marks: --/7 True or False:

The following relation represents a function.


x


1


2


3


4


5



y


2


3


2


3


2





Answer: True False ..Question 12
Marks: --/8 State the domain and range of the following relation.

{(-1, 0), (-2, 0), (-3, 1), (-4, 2)}

Choose one answer. a. D=(0, 1, 2); R = (-1, -2, -3, -4)
b. D=(-2, -3, -4); R = (0, 1, 2)
c. D=(-1, -2, -3, -4); R = (0, 1, 2)
d. D=(-1, -2, -3); R = (0, 0, 1)
..Question 13
Marks: --/7 Find the value of the function f(x) = 3x2 - 2x + 1 when x = -2.
Choose one answer. a. 17
b. 9
c. 6
d. -7
..Question 14
Marks: --/7 True or False:

The following relation represents a function.


x


4


4


6


6


8



y


-2


2


-3


3


-4





Answer: True

Explanation / Answer

For a relation to be a function, there must be one and only one y value for each x value. If there are two pairs of numbers that have the same x value but different y values, then the relation is NOT a function. So, because the there is only one value of y for each value, this IS a function. The domain of a function is the x values. The range of a function is the y values. So, (a) is your correct answer.

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