Algebra help

1. May 16, 2005

racheluckhardt

algebra 2 help...need it desperately

does anyone know algebra 2, i need to know how to complete this equation...
an expotential function of the form y=a(2)^x passes through the point (3,4). Find the value of a. choices a)2 b)1/2 c)3 d)3/4

2. May 16, 2005

OlderDan

Substitute the values in for x and y and solve for a.

3. May 16, 2005

arildno

Hi, rachel:
Saying that the graph passes through (3,4), means that the following equation holds:
$$4=a*2^{3}$$
1) Do you see why this equation must hold if the graph is to go through (3,4)?