Answer:
f(x) = 10^x -4
Explanation:
The horizontal asymptote of this exponential function is at y=-4, so there is a vertical translation of -4 added to the function. That is, the function is expected to be of the form ...
y = a·b^x -4
The graph crosses 1 unit above the horizontal asymptote at x=0, so there is no horizontal translation. Effectively, a=1 in the above equation.
The graph crosses 10 units above the horizontal asymptote at x=1, so the base of the exponent is b = 10.
The function appears to be ...
f(x) = 10^x -4