Pls help will give brainleist

Which quadratic function best fits this data? x y 1 32 2 78 3 178 4 326 5 390 6 337 a. y=11.41x2+154.42x−143.9 b. y=−11.41x2+154.42x−143.9 c. y=11.41x2+154.42x+143.9 d. y=−11.41x2+154.42x+143.9

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9