You can
put this solution on YOUR website!Here's a graph of your equation.

Let me see if I can decipher what you need.
.
.
.
Horizontal asymptote.
From the equation,

as x becomes large (negative), the exponent term quickly goes to 0,

as x approaches

As x goes to negative infinity, the horizontal asymptote is y=3.

It's shown here as the blue line.
.
.
.
The y intercept in (x,y) form is the point that the graph crosses the y axis.
In that case

and

In (x,y) format that would be (0,4).
The y-intercept is shown as the green circle.