N.linear! hope this helps!
C two electrons with two atoms! <3
Hi there!
The gravity or gravitational pull of the mass of the sun. The gravity pushes the sun down which keeps blowing it up. The heat and the pressure are the suns energy.
Hope this helped!~
First off, let's notice that the squared variable is the "x", that means is a vertically opening parabola.
notice the leading term's coefficient, is -2, is negative, that means the parabola is opening downwards, is facing down, so it goes up up up, reaches the U-turn and then down down down, is a "hump" or a maximum point.

and the line of symmetry, well is a vertical parabola, mirroring itself at the line x = -2, which is the x-coordinate of the vertex.