Please help find equation in slope intercept form

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

Place the following steps in order to complete the square and solve the quadratic equation,

The rectangle shown has a perimeter of 108 cm and the given area. its length is 6 more than five times its width. write and solve a system of equations to find the dimensions of the rectangle.