Let z represent the number of students in a class. Write an
expression for the number of students in 3 equal groups.

Where’s the graph too show me?

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0 

200+150+100+50+19=519519÷60=$8.65$8.65-$5.00=$3.65 < -- answer