Answer:
C. -3
Step-by-step explanation:
Start from (-1,4) drop down -6 spots then move over 2 spot to end up at (1,2). This is the same as writing -6/2 which equals -3.
If you start from other point (1,2) you'll have to move up 6 then back -2 to get to (-1,4) which is also -6/2 like above and slope is still -3.
Remember y = mx + b
m is the slope and with above example -6/2 top number is rise which move up/down and bottom number is run which move left/right.
Another way of solving it is:
(y2 - y1) / (x2 - x1)
4 - (-2) / -1 - 1
6 / -2
-3
