Identify and trace the conicoid y2 + z2 = x. describe its sections by the planes x = 0,y = 0 and z = 0.

is a paraboloid with vertex at (0, 0, 0) opening away from the origin centered on the line .

When , which means , so that this section is a single point, (0, 0, 0).

When , which is a parabola in the - plane with vertex at (0, 0, 0).

When , and this section is the same as the previous one, but lying in the the -.

it may be wrong but i think its a

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !