9514 1404 393
Answer:
yes, it is a function
Step-by-step explanation:
A graph represents a functional relationship if no vertical line intersects the graph in more than one point. A horizontal line passes this "vertical line test," so represents a function.
I believe the answer is A.
To find the inverse, interchange the variables and solve for y.
f^−1(x)=−25+5x/2
the answer is -3/2 and -11/2

just to clarify the engineering notation, E6 is just 1 and 6 zeros, or a million, thus, 107,000,000 is just 107E6.