Question

If the area of the triangle formed by the points (k,4/3) ,(-2,6) and (3,1) is 5 sq units, then k is..?

Answer 1

I did not know how to solve this problem, so I did some research.

the answer is 4 2/3 it checks.

I found an example here:
they solved k as a missing y value
http://download.nos.org/srsec311new/L.No.09.pdf

using a matrix

Answer 2

ok here I found the formula