The y-intercept of the function g(x)=2sin2pi(x-1)+1 is what?

The y intercept has a x value of 0.

g(0) = 2sin(2pi*(-1))+1
g(0) = 2sin(-2pi) + 1
g(0) = ?

That will give you the y value; the y intercept is (0, g(0))