Respuesta :

the vertical changeslso known as the slope, is 1.
(x,y)
y is vertical change

compare
(2.7,3.5) and (1.6,2.4)
compare VERTICAL change

3.5 to 2.4
3.5-2.4=1.1

it changed 1.1, but it went down so
the veritcal change is -1.1