equation

[jas14]

i've been trying to do this problem all day. any help u can give me would be great. its due tomorrow. thank you.

Apex Toy company Sales are seasonal. Peak in December at 100,000 dollars and lowest point is June at 20,000 dollars.

a. Write a function s=f(t), which could represent the dollar sales of this company at any time (t) after January
Tips for this one:
The Period is 12 months from December to December
leave all of the zeros attached
December has to be at negative one on the number line because January is zero therefore the C has to be positive.

b. What would you expect the sales to be in early April

 

[Guest]

assuming the relationship is linear(straight line)

start with this....
y=mx + b

Points are (-1, 100000) (5, 20000)

use m=(y2-y10 / (x2-x1)

this will give you the slope.

sub in the m and one set of points to find the b value

then rewrite the equation using the m and b value

now you have the equation. Next for the April results use x=3, find y.