Hello,

The y-intercept is the point where the graph intercepts the y-axis.

Any point on the y-axis has its absissa x=0

So find the point

Let's say you have a number N, that ends in a number X. N=AB...WX. Then N=10*(AB...W)+What is the last digit in the expansion of 3 to the power of 100. The calculator says the answer to this is 7, but I need to show how I got the answer.X.

...

See the pattern ?