A student is attempting to sketch a graph of the function f(x)= 4^x+2 -1. What are the values of the horizontal asymptote and the x-
intercept of the graph?

O The horizontal asymptote is y=-1 and the x-intercept is at (-2,0).

O The horizontal asymptote is y-2 and the x-intercept is at (-1,0).

The horizontal asymptote is y=-1 and the x-intercept is at (2,0).

O The horizontal asymptote is y-1 and the x-intercept is at (3,0).