For an exponential function the y-intercept is the "initial value" (not the common ratio).
[tex]y = 2 \times {1}^{x} [/tex]
will always be 2. if that's what you need
note that
[tex] {1}^{0} = 1[/tex]
because anything to the power of zero equals 0 (mathematically it's deciding something by itself)
