Challenge to get to a cabin, Diana can bike west from a parking lot along the edge of a rectangular reservoir for 0.5 miles and then south along the edge.
Alternatively, she can row a boat directly from the parking lot for 1.3 miles.
If Diana can ride 1.4 times as fast as she can row, which method of travel will
get Diana to the cabin faster?

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

x-3y=4

step-by-step e