What is the equation of the line tangent to the circle at the given point x^2+y^2=20 at (-4,2)

Write an equation of the line given the two points below (write your equation in slope-intercept form, y=mx+b): (-4, 4) and (6, -4)

Solve for x, y, and z. show all steps.

The graph of f(x), shown below, resembles the graph of g(x) = x2, but it has been changed somewhat. which of the following could be the equation of f(x)?