Wednesday

July 23, 2014

July 23, 2014

Posted by **Viggo** on Thursday, April 19, 2007 at 8:51pm.

Write an exponential function of the form y=ab^x that has a graph through (-2, 25) and (1, 10).

This is what I have so far:

10=ab^1

10/b=a

y=10/b*b^x

2/25=10b^-3

.008=b^-3

Then I am stuck. Am I doing it right so far? How do I continue? Thanks!

I don't get your second last line, I had:

25 = (10/b)b^-2

2.5 = b^-3

0.4 = b^3

b=cuberoot(.4)=.7368...

then a=10/.7368... = 13.572..

so y = 13.572(.7368)^x

I checked both data values, they work

gotcha thanks

**Related Questions**

Advanced Algebra - Find the exponential function of the form y=ax^b whose graph ...

math - find the exponential function of the form y=ab^x whose graph passes ...

Algebra - Explain how you would determine whether the graph of y = x^4 ...

alg 2 - Write an exponential function whose graph passes through the given ...

Algebra - I am given a graph of a parabola and I have to write a function in at ...

algebra - 3. write the function whose graph is the graph of y=sqrt of x, but is ...

Algebra II - Use the equation of the exponential function whose graph passes ...

math - i have more than one question so if u no any of the answers please tell ...

Math - 1. Write a quadratic function in intercept form whose graph has the given...

Algebra II - Use the equation of the exponential function whose graph passes ...