Find the slope of the line passing through the pairs of points and describe the line as rising, falling, horizontal or vertical. a. (2 , 1) , (4 , 5) b. (-1 , 0) , (3 , -5) c. (2 , 1) , (-3 , 1) d. (-1 , 2) , (-1 ,- 5)

Step-by-step explanation:

The formula of a slope:

If

m > 0, then a line is rising

m < 0, then a line is falling

m = 0, then a line is horizontal

m is undefined, then a line is vertical

(2, 1) and (4, 5)

(-1, 0) and (3, -5)

(2, 1) and (-3, 1)

(-1, 2) and (-1, -5)

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step-by-step explanation: