Please help me !! I don’t know how to work this problem

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Which strategy is used by public health to reduce the incidence of food poisoning?

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.