Scientists have determined that the cycle of a population of humans, h(x), measured in millions,
over a 20-year period, where x represents the number of years since 1990, can be modeled using
the sinusoidal function shown below,
h(x) = -40cos @ (x-1)+70
(a)
determine the amplitude, period, vertical shift and horizontal shift. indicate the appropriate
units for the amplitude and the period,
amplitude
period
vertical shift
horizontal shift