The mean of the masses of a group of four students is 30 kg. One student joins the group. The mean of the masses og the five students is 32 kg. Find the mass of the student who joined the group.

Mass of New student who joined the group will be :

y = - 6

step-by-step explanation:

given the point (- 2, y) lies on the graph then it is a solution of it's equation.

substitute x = - 2 into the equation for value of y

y = 3(- 2) = 3 × - 2 = - 6

the point on the graph is (- 2, 6)