Ex: Find an Exponential Function Given Two Points - Initial Value Not Given

This video explains how to determine the equation of an exponential function in the form y=ab^x given two points on the function. The y-intercept or initial value is not given in this example.

[josefkeup]

I have virtual school no days and things with math are getting really hard, this saved me from failing a Summative that would have gotten me an F. Thanks for this video so much and keep up the GREAT WORK!

[lilmamagc]

thank you so much. I'm in college taking pre-calc ONLINE during the summer (big mistake) after not having taken college algebra in 5 years. Your example was just like my homework. Thahnk you so much for BREAKING IT DOWN and showing exactly all the steps.

[audiomac]

SUPER HELPFUL! However, it was a bit confusing when you said b^1 cancels b^-1. I personally think you should have reminded us that b^-1 is equal to 1/b. It would have been a little simpler. Overall, though, I am greatful 👍

[XxkilluminatixX]

Snowed in today, couldn't get up to the school for help but this was all I needed. Thanks!!!

[EagerLearner]

also,
a * b^(-1) = 5/4
Can be written as
a/b = 5/4
It is then obvious a = 5 and b = 4

[vanessachen]

very clear and precise explanation, thank you very much!

[thickerthanabowlofoatmeal]

what if it is not a fraction, do you still multiply, or do you not. Instead, divide?

[ayonixanimations]

I've done this type of problem a million different ways, finding dozens of videos and articles explaining how to do it, and following the instructions the exact same way if applied. And I can NEVER get the function to pass through BOTH of the points, it only ever goes through one of them, and I have no clue why this happens and there's nothing on this anywhere.

[cam-bo]

I don't understand why we have to solve for 'a' the second time. We've already found out it's 5/4b. ??

[AwsomeNinjaGuy]

I'll probably still fail my math assignment, but at least I'll get this right. Thanks so much!

[drewan]

would it still be the same process if both equations had negative exponents?

[annabusby]

Alondra Orozco i know its late but i think you just add that number on the end as a c value according to another video.

[fridericusrex]

WHAT ABOUT HORIZONTAL SHIFT OR COMPRESSION? How do you find those?

[CelesteCKing]

GROWTH OR DECAY..Why did we choose (1+r) instead of (1-r)? PLZ EXPLAIN?

[CelesteCKing]

Plz SLOW DOWN..Majority of your students are Pre-Calc. College..Gotta baby us along, remind us of rules, & most of all "BETTER EXPLAIN" your reasons for ea. step, PLZ??🙏🙏🙏
I've NEVER received below a 4.0 in every class for past 3 yrs., & you continuously confuse me when I come across your videos??....

[CelesteCKing]

You talk way to fast & your way of doing things doesn't only make problems more difficult, but usually doesn't match my Professor's results..
Wish you would slow down, & talk through things a lot more😊