# Math Help - exponential curve S0S

1. ## exponential curve S0S

Need help- greatly appreciate it!
Find an equation of an exponential curve that contains the points (3,85) and (7,13) . Show work and do not use the regression capabilities of your calculator. (The last part led to my demise)

2. Originally Posted by tinycara
Need help- greatly appreciate it!
Find an equation of an exponential curve that contains the points (3,85) and (7,13) . Show work and do not use the regression capabilities of your calculator. (The last part led to my demise)
$f(x)=Ce^{bx}$

So we know that $85=Ce^{3b}$
and that $13=Ce^{7b}$

Now solve those simultaneously

3. ## Same question

That same question was in my worksheet! I'm stuck on how to solve simultaneously how would you go about doing that?