Create an equation!
a graph has a y-intercept at -5, no x-intercepts, and discontinuous points at (-1,-5) and (3, -5). i want to form an equation for this graph, but i don't know how the y-intercept relates to the graph of a rational function. here's all i have so far:
y = (x+1)(x-3)/(x+1)(x-3)
i realize this isn't even close to being complete; i need some direction on how to finish the equation. any would be appreciated.

What is the equation of a line that passes through points (0, 4) and (-4,-8)?

Brittany has designed four different birdcages, each with the same volume: a square pyramid, a cylinder, a cone, and a sphere. the zoo wants to use one of brittany’s designs but plans to change the volume of the cage. find the design change that would result in the birdcage with the greatest volume. a.) increase the area of the base of the square pyramid by a factor of ten. b.) increase the height of the cylinder by a factor of ten. c.) increase the radius of the cone by a factor of ten. d.) increase the radius of a sphere by a factor of ten.

Explain how the quotient of powers was used to simplify this expression.