Exponential Graph, given horizontal asymptote, y-intercept

[Guest]

If the horizontal asymptote of an exponential graph is -3 and the y intercept is -4 then a possible rule for the equation is:

????

I am guessing it would be of the form y = e^(ax) + constant?

 

[skeeter]

a close guess ... how about Ce^ax + k ?

 

[Guest]

I am guessing this too...

a close guess ... how about Ce^ax + k ?

then how about 3e^x + 4?

 

[skeeter]

then how about 3e^x + 4?

no, how about y = -e^x - 3 ...

graph both functions and see which one has a horizontal asymptote at y = -3 and y-intercept of -4.