1. The problem statement, all variables and given/known data Match the function with the description of its gradient. 2. Relevant equations f(x,y,z)=√(x^2+y^2+z^2) 1. constant, parallel to xy plane 2. constant, parallel to xz plane 3. constant, parallel to yz plane 4. radial, increasing in magnitude away from the origin 5. radial, constant magnitude 6. radial, decreasing in magnitude away from origin 3. The attempt at a solution grad f(x,y,z)=(df/dx)i+(df/dy)j+(df/dz)k grad f=[(x^2+y^2+z^2)^-.5](xi+yj+zk) I know it's definitely radial. I found a solution online that said the magnitude was constant though, and I can't tell why.