Need help on this question, I got it wrong on my exam review booklet. help me how to get to answer key answer of 6.4
#sinusoidal graph word problem
tacit axle
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golden cave
Need help on this question, I got it wrong on my exam review booklet. help me ho...
alright start with period and amplitude
and midline i guess
get those out of the way
tacit axle
amplitude is 2.5, midline is at 8.3, period i have 2pi/9
golden cave
and the x axis is x hours after midnight righit
tacit axle
yes
golden cave
but when is it max again
tacit axle
i dont know, sorry
golden cave
okay, uhhh
a wave goes from max to min back to max
and these two times are equal right
tacit axle
yes
golden cave
the time it takes to go from max to min is the same as it takes to go from min to max
so with that in mind
can you find the period
tacit axle
im still thinking its 9
golden cave
period is the time it takes to reach the same place on the graph
so max to min is 9 hours
thats not the same
golden cave
so max to min is 9 hours
^
tacit axle
2pi/18 so reduced it is pi/9
golden cave
yup
tacit axle
i believe there is no phase shift
tacit axle
sin
golden cave
remember we start at a maximum