6. A snowboard company uses the relation: P(x)=210x-60x² to model its profits. In the
model, "P" is the profit in thousands of dollars and "x" is the number of snowboards in
thousands.
a. How much profit should the company expect if they manufacture 2000 snowboards? (3
marks)

b. The maximum profit of snowboards sold can be found at what point of the graph? (1 mark)
A. x-intercept
B. y-intercept
C. origin
D. vertex