Which graph could be used to show the situation described?

the temperature decreases by 0.5 degrees every hour.

from left to right its a), b), c) and d).

By the information of all the graphs,
Take any two points from the axis in graph C,
Temperature variation would be: 4-3 / 2-0 = 1/2 = 0.5
It is same which was aked in the question, so that will be your answer.

Option C would be your answer.

Hope this helps!

6(2x + 5y)6 (2x) = 12x6 (5y) = 30y12x + 30y