Respuesta :

slope formula : slope = (y2 - y1) / (x2 - x1)
(2,3)...x1 = 2 and y1 = 3
(4,2)... x2 = 4 and y2 = 2

now we sub and solve
slope = (2 - 3) / (4 - 2) = -1/2 <==