Question 1160996
Points as time x, distance from camp y, (x,y):
(0,20), (2,13), (4,6).


{{{y=mx+20}}}
-
{{{m=(13-20)/2=(6-13)/2}}}
{{{m=-7/2=-7/2}}}
-
{{{highlight(y=-7x/2+20)}}}



She is hiking at 3.5 miles per hour.