Answer:
B
Step-by-step explanation:
slope = (y2 - y1) / (x2 - x1)
y2 = 10
y1 = 9
x2 = 2
x1 = 9
Which point you call 2 and which you call 1 does not matter. You will get the same answer. Once chosen, you must be consistent.
slope = (10 - 9) / (2 - 9)
slope = 1 / -7
To calculate the slope or gradient of line use the formula:
[tex]m = \frac{y2 - y1}{x2 - x1} [/tex]
Thus, the slope of this line
[tex] = \frac{9 - 10}{9 - 2} = \frac{ - 1}{7} [/tex]
Thus, the answer is B
