Question

(Q2) Which of the following points lies on the graph of the function y = 4x ?

Answer 1

Answer:

C

Step-by-step explanation:

I think I will answer the question the your attachment because it has full information.

The function is: y = 3*$2^{x}$

a. The function decreases

Wrong, because the base number is 2 and it is greater than 0. The function will go up

b. y=intercept of  (0.2)

Wrong, Let substitute x =2 into the function: y = 3*$2^{2}$ = 12  

c. if x increase by 1, the value of y will double

Because the base number is 2. For example:

• If x = 2, y = 3*$2^{2}$  = 12

• If x =3, y =3*$2^{3}$ =(3*$2^{2}$*)2  = 24

d. contains the point (2,4)

Wrong, Let substitute x =4 into the function: y = 3*$2^{4}$ = 48

So we choose C