It dropped by 4.5 means that we have to subtract 4.5 from 9.2
9.2 - 4.5 = 4.7 °C
So 4.7 °C is your answer :D
Well if you know what a -X graph looks like (a diagonal line that goes from the top left to the bottom right, reading the graph from left to right). The answer is simply everything under that line. However, in this case, it also includes the space that the line is in itself. This is because it's less than OR equal to -x
1- 1/2 *2 on both bottom and top to make it equal with '3/4' = 2/4
2- 2/4 + 3/4 = 7/ 4
3- 1 3/4+ 2= 3 3/4
4- 3 3/4 cups of flour.