If v(x, y) is the electric potential at a point (x, y) in the xy-plane, then the level curves of v are called equipotential curves because at all points on such a curve the electric potential is the same. sketch some equipotential curves if v(x, y) = c/ r2 − x2 − y2 , where c and r are positive constants.

Two different linear functions are shown below with two points given from each function. use slope-intercept form or point-slope form to find the equation of each. linear function a points: (–5, –2), (–5, 7) linear function b points: (7, –5), (–2, –5) function a has: the equation of line a is: function b has: the equation of line b is:

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.