equation of the form oard" look grooves can be modelled by a sinusoidal no e (y = asin(bx + c)+d then the distance between the grooves of a "washboard" road could be found by using the parameter y= asin ( bx to)to Max elevation = 550 A. a a + 25= 5 5 3B. 0 minelevation =-5 cc. [1] Bosin(C) = P = 30 The time when 4. A biologist collects data on a population of rabbits as indicated below. The exevations D.d- 25 is To days ? Number of rabbits (millions) ABCDEFG H Time (years) Determine an expression/calculation that could be used to determine the number of years between consecutive maximum populations. [1] goodblov ui broni sis forgilnue woodrow avob them wod violsmizorags to 5. A sinusoidal graph has a maximum at the point (5, 12) and a minimum at the point (8, 4). Determine the midline of the graph. [1] soim onT Jnezen elso lo rodmun ed when oflove of bonoq whom-sno s ni mapping soim to modern noag19 90im rate thomeaxe erfoodie edmun sibel y bris 29 10 5 6. A sinusoidal graph has a maximum at the point (-40, 3) and a midline of y = -12. Determine the [1] amplitude of the graph. 7. Laurie's position on a Ferris wheel can be modelled by the function h(t) = 15.4 sin (2.3t - 1.4) + 17.2 where h(t) represents her height in metres and t represents the time in minutes. a) How much higher, to the nearest tenth of a metre, is she after 0.5 min than at the start of the ride b) For how many minutes in one turn of the Ferris wheel is Laurie higher than 10 m