Question

Find the slope of the line that goes through the given points.

(-1, 4), (5, 4)

Answer 1

The slope of the line through points (x1,y1) and (x2,y2) is given by :
\(\huge m=\frac{y_1-y_2}{x_1-x_2}\)
now,just put the values and find m.

Answer 2

slope = (y2 - y1) / (x2 - x1)
(-1,4) x1 = -1 and y1 = 4
(5,4) x2 = 5 and y2 = 4
now sub
slope = (4 - 4) / (5 - (-1)
you can finish with the math...
keep in mind, horizontal lines have 0 slope and vertical lines have undefined slopes.