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exponential equations
y=ab^x
I have a table with exponents given (x) and y given. I need to find a and b. x y 0 300 2 48 3 19.2 4 7.68 What is the formula to solve a and b? |
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write y=a b^x replacing y and x with the values in your table. That gives you four equations. The first equation, 300 = ab^0 is an intercept (x=0) and will give you the value of "a" the second equation, 48 = ab^2, can be solved because you already know "a". The other two equations that you can make are not really needed. Use them to make sure your answer is correct. 19.2 = a b^3 7.68 = a b^4 |
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