In: Advanced Math
For the following exercises, write a logarithmic equation corresponding to the graph shown.
Use f(x) = log4 (x) as the parent function.
Refer to the graph shown in the exercise.
From the graph the vertical asymptote is x = -2 and has been vertically reflected.
The equation will be in the form;
y = blog4(x + 2) + k
It appears the graph passes through the points (-1, 0) and (2, 3) substitute (-1, 0) as follows:
0 = alog4(-1 + 2) + k
0 = alog4(1) + k
0 = 0 + k
k = 0
Now substitute (2, 3) as follows:
3 = alog4(2 + 2) + 0
3 = alog4(4)
a = 3
Thus the equation of the function is y = 3log4(x + 2).
Now check the equation by graphing the function as shown below:
Thus the equation of the function is y = 3log4(x + 2).