Answer:
See image and connect the lines using the coordinates.
Step-by-step explanation:
Step-by-step explanation:
Let ABC be a right angled triangle where there's a right angle in B . Let the measure of the angle BAC be ∅. So,


Also,


Now adding the values of sin^2∅& cos^2∅,


But we know that
by applying Pythagorean Theorem
So ,

A: -15/5 degrees Celsius
B: -15/5=3 degree Celsius
every 5 weeks it change -15°c
so each week it changes -3°c