Answer:
B) .
Step-by-step explanation:
The vertex form of the equation is given by .
We plug in the vertex to obtain:
.
Since the graph passes through (5,5) and (9,5), they must satisfy its equation.
Divide both sides by 4.
Therefore the equation is:
The solution is 1.
Logarithm:
Suppose we have a logarithmic equation in the following format:
It means that:
In this question:
Which means that:
Every number, elevated to 0, is 1. So
Which means that the solution is