4 Marks: --/7 Find the value of the function f(x) = -x2 + 4x - 1 when x = -4. Ch

Question

4
Marks: --/7
Find the value of the function f(x) = -x2 + 4x - 1 when x = -4.
Choose one answer.
a. 31
b. -33
c. -1
d. 1
Question 5
Marks: --/8
State the domain and range of the following relation.

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

Choose one answer.
a. D=(2, 3, 4); R = (0, 1, 2)
b. D=(0, 1, 2, 3); R = (1, 2, 3, 4)
c. D=(1, 2, 3, 4); R = (0, 1, 2, 3)
d. D=(0, 1, 2); R = (1, 2, 3)
Question 6
Marks: --/7
True or False:

The following relation represents a function.

{(1, 7), (-2, -8), (1, 9), (-3, 10)

Answer: True False

Explanation / Answer

f(x) = -x2 + 4x - 1 when x = -4. f( -4) = - (-4)^2 + 4 (-4) -1 = -16 -16 -1 = -33( its B) c. D=(1, 2, 3, 4); R = (0, 1, 2, 3) False

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