Find the slope of each line without dots on the line?

Can someone me and do the problem plz so i can understand it more better

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²