1. Which one of these functions is a power function, a polynomial function or neither? Justify your answers. f1(x)=5x3 2(x) = 1 x+3 f3(x) 1.2x3 -0.7x. 2. Find the vertex and the x and y intercepts of the quadratic function f(x) = 4x - 8x - 12. 3. Find all x and y intercepts of polynomial function y = x46x2 +8. 4. Find all the zeros of the function f(x)=x6 6x+9x4 with their multiplicities. 5. Sketch the graph of the function g(x) = 2x+3x - 5 using its vertex and its the x and y intercepts. 6. Find the equation of the quadratic function which has the following graph 8 4 2 -6 2 0