Question

Identify the type of relationship that exists between the number of people in the room and the total number of handshakes.

Answer 1

(number of people in room)*(number of people in room -1)/2

Answer 2

if there were 5 people in the room, you'd do (5*4)/2=10 possible handshakes
6 people => (6*5)/2
n people => n(n-1)/2

Answer 3

i just answered question c

Answer 4

i think no of handsakes = summation of 1 to n-1 , where n is the no of people

Answer 5

i guess

Answer 6

docworker was right

Answer 7

let n be no of people, then no of handsakes =