Anyone wanna do a zoom M e eting

Geometry? i am really bad at math and have dyscalcullia. .

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

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?