How do I find the slope of the line through these pair of points

(-7/5, 3/10) and (1/5, -1/2)

slope = (y2 - y1) / (x2 - x1)
slope = (-1/2 - 3/10) / (1/5 - (-7/5))
slope = (-5/10 - 3/10) / (1/5 + 7/5)
slope = (-8/10) / (8/5)
slope = (-8/10) / (16/10)
slope = -8/16
slope = -1/2

the slope is the difference between y's divided by the differences in x's

(-1/2 - 3/10) / (1/5 - - 7/5)

-8/10 / 8/5 or - 5/10 or -1/2

(y2-y1)/(x2-x1)=slope and then the line is y=mx+b

Slope is rate of change.
m = (-1/2 - 3/10)/(1/5 - [-7/5]) = -0.5

m= y1-y2
--------
x2-x1
(-7/5 is x1 and 3/10 is y1----- 1/5 is x2 and -1/2 is y2)
Enjoy my Math genius tip :D