What is the slope function?

Quadrilateral ghij has coordinates g(5, 1), h(4, -3), i(6, -1), and j(2, 1). if the quadrilateral is reflected over the line y = x, what are the coordinates of h'?

The slope of the line whose equation is 3y = 2x - 3 is 2 2/3 3/2

What integer is equivalent to 9 3/2