Is cutting a string physcal or chemical change

This is a physical change because cutting the string didn't change it chemically, but it did physically.

A.) the independent variable is the time because the x axis is always the independent variable because it shows the “cause”

B.) the dependent variable is the distance because the y axis is always the dependent variable otherwise know as the “effect”

C.) the line segment would be BC because the distance from home decreases to 0 meaning she arrives at her house.

F.) average speed = distance/time, so you then plug the numbers in
V= 20/40
V=.5 mi/min

G.) I don’t have time to respond to this right now, but I’ll reply the answer in a second