SOLUTION: I think my graph is right, but I did it by substitution.. I can't get the X-intercept to match my graph... Graph the function f(x)= 2 * (3^x)

SOLUTION: I think my graph is right, but I did it by substitution.. I can't get the X-intercept to match my graph... Graph the function f(x)= 2 * (3^x) - 5. Indicate the horizontal asym

Question 34527: I think my graph is right, but I did it by substitution.. I can't get the X-intercept to match my graph...
Graph the function f(x)= 2 * (3^x) - 5. Indicate the horizontal asymptote (which I believe is y=-5) also find the X-intercept (exact solution and then round to four decimal places.)
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I'll try to plot some points and then refer to the graph
y-intercept:

when x = 0, y = -3
-----------------------
x-intercept:

take log base 10 of both sides

when y = 0, x = .834
-----------------
asymptote:
When x approaches -infinity, 2 * 3^x approaches 0,
and y approaches -5

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