Slope is -2 and y-intercept is -6 how do i write the linear equation in slope intercept form

Which statements are true about additional information for proving that the triangles are congruent check all that apply

Factor the polynomial by its greatest common monomial factor.

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1