Calculate the slope, if defined, of the straight line through the given pair of points. Try to do the problem without writing anything down except the answer. HINT [See Quick Examples on page 79.] (If an answer is undefined, enter UNDEFINED.)
(8, −1) and (8, −8)

Question

Calculate the slope, if defined, of the straight line through the given pair of points. Try to do the problem without writing anything down except the answer. HINT [See Quick Examples on page 79.] (If an answer is undefined, enter UNDEFINED.)
(8, −1) and (8, −8)

anonymous · Answer

since both the first numbers are the same, it is undefined

anonymous · Answer

undefined because delta x becomes zero hence the gradient approaching to infinity

agreene · Answer

$$m=\frac{\Delta y}{\Delta x} \implies \frac{y_2-y_1}{x_2-x_1}$$
in this case, x_2 =x_1 thus delta x = 0 and the fraction is undefined.

anonymous · Answer

this is a vertical line right :? bit out of practice with graphing