# How do you determine the amplitude, period, phase shift and vertical shift for the function y = 3sin(2x - pi/2) + 1?

$y =$Amplitude*sin(kx-phase shift)+ vertical shift
$P e r i o d = \frac{2 \pi}{k}$ (where, in your case, $k = 2$);
Phase shift$= - \frac{\pi}{2}$;
Vertical shift$= 1$;