Mine is pretty rough but hope it helps look at the attached image.
It is -3 degrees Celsius per 1 hour. <span />
so based on what is given they are congruent. If you rotate <DEF till it matches <ABC you will see they are the same size.
Divide 630 miles by 70 mph to get:
9 hours
-75 because the change in y over the change in x is -75/1, which is simplified to -75. Hope this helps!