Homework Help: math

Posted by liz on Thursday, October 7, 2010 at 8:42pm.

Find equations for exponential functions that pass through the given pair of points. (Round all coefficients to 4 decimal places if necessary.)
(-2, 3) and (3, 4)

math - bobpursley, Thursday, October 7, 2010 at 8:45pm
y= K e^ax

3=Ke^-2a
4=Ke^3a

divide the equations

3/4= e^(-2a-3a)
take the ln of each side
ln .75 = -5a
solve for a. Then go back,either equation, solve for K

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