Answer:slope = 2
Step-by-step explanation:The slope of the line can be calculated using the following rule:
slope =

In the given, we have:
point (-1 , 4) representing (x1 , y1)
point (3 , 12) representing (x2 , y2)
Substitute with the givens in the above formula to get the slope as follows:
slope =

Hope this helps :)