The equation y=4.2x could represent a variety of situations. Write your own description of a situation represented by this equation. Decide what quantities x and y represent in your situation.

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?