- #1
mimi.janson
- 80
- 0
Homework Statement
Hi
I need to determine ragulatory for f, where the expiration time is measured as the function of the temperature.
The function type is f(t)=b*at
i get two pair of datas which are that for -15 °C the expiration day will be after 200 and by -5 ° the expiration day will be after 10 days
Homework Equations
I know that t is the temperature and f(t) must be the days, and i need to determine a regulatory for f, which means i need to find a and b i think
so i should maybe put my given informations in f(t)=b*at which will be
200=b*a-15
and
10=b*a-5
then i shall isolate b
200/a-15 =b and 10/a-5 =b
these to get put up agains each other so a can be solved.
200*a-5 =10*a-15
now i solve a
200=10*a-20
a=tenth√(200/10)
a=1.16
But it is wrong and i don't get why so can someone please help me??