Question

At 3 p.m., the temperature is 12. It then began dropping 2 every hour for 7 hours. What was the temperature after 7 hours?

Answer 1

At 3 pm = 12
7×2=14
12- 14 = -2

Answer 2

The equation for this is:
y = 12 - 2x
We know x is 7 since it is 7 hours
So 2 x 7 is 14 
12 - 14 = -2
It ended as -2 degrees