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**qleeq** the low temp in chicago is 25 degrees, occurs in january. x = 1(january)

average high is 75 degrees which occurs in july. x=7(july)

determine the constants so that the function $\displaystyle f(x)=asin(b(x-c))+d$ models the data, where f(x) gives the temperature as a function of x.

this is what I have:

$\displaystyle f(x) = -25sin(\frac{\pi}{6}x-1)+50$

it just doesn't look right to me. though, when i go to 2nd => calc => value, it gives me close to the exact values being off only by a hundred or less.