How to write an equation in slope intercept form when given two points?

Need ! easy 6th grade work! i will put as much points as i can! you so much! i’m learning this in math and it’s soo

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm