Answer:
F, K & G
Step-by-step explanation:
Points are colinear if they lie on the same straight line.
only K , F & G line on a straight line.
3 divided by 2 is 1.5 so c
First set everything to 0.

Giving you A= 1 , B= 1 and C= -5
Then input everything into the quadratic formula and either solve by hand or use a calculator.
Note exact values are found by hand, decimals are found using a calculator.