Given the linear equation & its graph, what is the slope?​

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

Find the roots of the equation below. x^2 - 6 + 9 = 0

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet