Find the slope of the straight line that passes through the given points or state that the slope is undefined. Then indicate if the line through the points rises (left to right), falls (left to right), is horizontal, or is vertical

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

1b. (7, 1) and (7, 2)

1c. (1, 7) and (-2, -2)

1d. (-1, -5) and (-4, -5)

Question

Find the slope of the straight line that passes through the given points or state that the slope is undefined.  Then indicate if the line through the points rises (left to right), falls (left to right), is horizontal, or is vertical

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

1b. (7, 1) and (7, 2)

1c. (1, 7) and (-2, -2)

1d.  (-1, -5) and (-4, -5)

mimi_x3 · Answer

lols , use the gradient formula 
y^2 - y^2 / x^2 - x^1

anonymous · Answer

in each case compute
$$m=\frac{y_2-y_1}{x_2-x_1}$$ so for example the first one would be 
$$,=\frac{-1+5}{-1-2}=-\frac{4}{3}$$

anonymous · Answer

don't know where i got that from. second one x values are the same, so slope does not exist

anonymous · Answer

third one is the one i wrote and deleted: 
$$m=\frac{-2-7}{-2-1}=\frac{-9}{-3}=3$$

anonymous · Answer

4th one y values are the same so slope is 0

anonymous · Answer

thank you so much!

anonymous · Answer

yw