(b) In their last 50 matches, Plaza United have drawn 10 matches, lost 5 and won the rest. Sam claims
The probability that Plaza United will win this match is 0.7.
(0) Show calculations to support Sam's claim.
[2]

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)

the solution is 12x-6y