When the function f(x) = 6(9)x is changed to f(x) = 6(9)x + 1, what is the effect?

there is no change to the graph because the exponential portion of the function remains the same.
all input values are moved 1 space to the right.
the x-intercept is 1 space higher.
the y-intercept is 1 space higher.

The answer would be:
The y-intercept is 1 space higher.

This equation is a y=mx+b and if you didn't already know, the +b is the y-intercept. It's where the equation intersects with the y line. Since the original equation didn't have one, it means it passed through the origin and now that it has one, the intersection would be (0,1). Because of this, the whole equation would shift up 1 whole unit.