Which function is represented by the graph below?

a. f(x) = 3x

b. f(x) = 3x − 3

c. f(x) = 3x + 3

d. f(x) = 3(x + 3)

Equation:  

A is correct

Step-by-step explanation:

Given: The graph of a function on x-y coordinate plane.

y-intercept: (0,1)

Graph starts from II quadrant touches x-axis at infinity.

End in I quadrant increases gradually.

This is property of exponential function.

y-intercept: (0,1)

Passing point: (1,3)

b=3

Equation of graph:

Hence, The equation of given graph is

(x+3)(x+7)

step-by-step explanation: