How do you write an equation of the line containing the point (4, 6) and the parallel to the line #y= 1/4x + 4#?

↳Redirected from "How do I change #int_0^1int_0^sqrt(1-x^2)int_sqrt(x^2+y^2)^sqrt(2-x^2-y^2)xydzdydx# to cylindrical or spherical coordinates?"