Question 12

Marks: 4

[3.05]

Which of the following does not represent a function?

Choose one answer.

a.

x в€’3 0 1 в€’3 1

y 1 в€’1 в€’2 в€’3 в€’4

b.

x 3 6 9 12 18

y 1 3 5 7 5

c.

x в€’4 в€’2 0 2 4

y в€’5 в€’4 в€’3 в€’2 в€’1

d.

x 6 5 4 3 1

y в€’6 в€’5 в€’4 в€’3 в€’1

Question 14

Marks: 4

[3.05]

Choose the relation with a domain of {в€’6, в€’3, в€’2, 0, 5}.

Choose one answer.

a. R = {(в€’6, в€’3), (в€’2, в€’2), (0, 5)}

b. R = {(6, 5), (3, 0), (5, в€’3), (5, в€’6), (8, в€’2)}

c. R = {(5, 0), (в€’2, в€’2), (в€’3, в€’6)}

d. R = {(в€’3, 5), (в€’6, 4), (в€’2, 2), (5, в€’2) (0, в€’1)}

Question 15

Marks: 4

[3.05]

Choose the relation with a range of {в€’4, в€’2, 0, 1, 3}.

Choose one answer.

a. R = {(2, 3), (8, 1), (2, 1), (в€’5, 0), (4, в€’4), (5, в€’2)}

b. R = {(3, 2), (1, 8), (1, 2), (0, в€’5), (в€’4, 4), (в€’2, 5)}

c. R = {(в€’4, в€’2), (0, 0), (1, 3)}

d. R = {(3, 1), (0, 0), (в€’2, в€’4)}

Question 16

Marks: 4

[3.06]

Given the function g(x) = 8x в€’ 2, compare and contrast g(в€’2) and g(4). Choose the statement that is true concerning these two values.

Choose one answer.

a. The value of g(в€’2) is larger than the value of g(4).

b. The value of g(в€’2) is the same as the value of g(4).

c. The value of g(в€’2) is smaller than the value of g(4).

d. The values of g(в€’2) and g(4) cannot be compared.

Question 17

Marks: 4

[3.06] If f(x) = 2x + 6, find f(7).

Choose one answer.

a. 14

b. 15

c. 20

d. 6

Question 18

Marks: 4

[3.06]

If f(x) = в€’4x + 1, find f(в€’5).

Choose one answer.

a. 20

b. в€’19

c. 21

d. в€’8

19

Marks: 4

[3.06]

If g(x) = x2 в€’ 3, find g(4).

Choose one answer.

a. 13

b. 5

c. 16

d. в€’3

Question 20

Marks: 4

[3.06]

If f(x) = x + 3, find the value of x if f(x) = 9.

Choose one answer.

a. 6

b. 12

c. 3

d. 9

12.) ":a": does not represent a function because for x=-3, there are two ":y": values. This cannot happen in a function.

14.) The domain is all ":x": values of the function, so the correct answer has ":x": values of -6, -3, -2, 0, and 5, which is ":d":.

15.) The range is all ":y": values of the function, so the correct answer has ":y": values of -4, -2, 0, 1, and 3, which is ":a":.

16.) Plug in -2 and 4 for ":x": in the function and compare:

g(x) = 8x-2

g(-2) = 8(-2) – 2

g(-2) = -16 – 2

g(-2) = -18g(x) = 8x-2

g(4) = 8(4) – 2

g(4) = 32 – 2

g(4) = 30As you can see, g(-2) is smaller than g(4), which is ":c":.

17.) Plug in 7 for ":x": and solve:

f(x) = 2x + 6

f(7) = 2(7) + 6

f(7) = 14 + 6

f(7) = 2018.) Plug in -5 for ":x": and solve:

f(x) = -4x + 1

f(-5) = -4(-5) + 1

f(-5) = 20 + 1

f(-5) = 2119.) Plug in 4 for ":x": and solve:

g(x) = x^2 – 3

g(4) = 4^2 – 3

g(4) = 16 – 3

g(4) = 1320.) Plug in 9 for f(x) and solve:

f(x) = x + 3

9 = x + 3

x = 6

Question17

F(x)=2(7)+6=20Question 18

F(-5)=-4(-5)+1=21

Question 19

G(4)=4(2)-3

=5Question 20. Answer is 3

If x is 9… 9=9+3….

9-9+3=3

have you really studied ":functions":? or started solving problems directly?

m extremely sorry!! Maths is allergy for me

Do your own homework .