Question

Which is the graph of f(x) = 100(0.7)x?

Answer 1

do you have answer choices? simplified your equation is f(x)=70x which is the same thing as f(x)=70x+0. Your graph will look like this: i don't see your choices though

Answer 2

I think you mean \(f(x)=100(0.7)^x\)
The graph of \(f(x)=a(b^x)\) looks like this:

The graph intersects the y-axis at (0,a).
When b>1, the curve rises (f(x) increases with x)
When b<1, the curve falls (f(x) decreases with x)
So substitute your parameters and find the right curve.