To calculate the slope between two points (x1, y1) and (x2, y2), you can use the following formula:
Slope (m) = (y2 - y1) / (x2 - x1)
In your case, the points are (1, 5) and (3, 12), so you can plug these values into the formula:
Slope (m) = (12 - 5) / (3 - 1)
Slope (m) = 7 / 2
So, the slope between the points (1, 5) and (3, 12) is 7/2.