You should also try wolframalpha.com it can also help u. Just send this exact picture and then they'll help you
hope this helps
Step-by-step explanation:
first way by sitting 3 person in one chair
Answer:
–10
Step-by-step explanation:
Answer:
the one that looks like a V
1. take a ruler
2.move it across the graph
3.see if it crosses twice
ex:if it is a straight line than it wont work if it is like a V shape it will work