Anyone please help I need the exact answer! What is the cosine equation of the function shown? Enter your answer by filling in the boxes. Enter any phase shift as its smallest multiple from the fundamental period.

The answer to your question is  5(cosx + π/4) + 4

Step-by-step explanation:

General equation of trigonometric functions

                          f(x) = A(cos bx + c) + d

A = amplitude

b = period

c = change of phase

d = vertical change

Process

1.- Calculate amplitude

From the lowest to the highest point the function measures 10 units, but A is 10/2 then A = 5.

2.- Calculate period, the cosine graph goes from 0 to 2π. Period does not change so b = 1.

3.- Change of phase, the graph must start in (0, 1) but this graphs starts in (-π/4, 9) so c = π/4.

4.- Calculate the vertical displacement , it moved upward 4 units, so d = +4

5.- The equation is  5(cosx + π/4) + 4

6.- See my graph below

the first one, all those points on the line just make a strait line.