Graph C because it goes through the point (1,0)
Let's assume the temperature was 10.
it increased 25% so this is the equation for it:
10 +25%=12.5 degree.
then it decreased 40%
so it will be as follow:
12.5 degree - 40%= 7.5 degrees.
The correct answer is B x=-3 and x= positive 5/2
The correct way is to plug in the answer back into the equation and see if it results in the correct solution.
It is any fraction except 0 of 180°.
