In an assignment of mine we are required to plot a graph and it's table of values, the problem I'm having is the values must not be in decimal form, so for example;
If I have the function below, and I need to find the value for y, if x=-2 how do I find that without it turning it into a decimal. The answer in the practice question says Y=-7/9. I think I understand where the 9 came from, but thats about it (3^{-2} = 1/9)
y = 2(3)^{x }– 1
Anyone care to explain?
I hate to say it but if you are taking algebra or preCalculus and can't subtract fraction you have a serious problem! Get "common denominators". You understand that , don't you? .