Final answer:
The slope of the line passing through the points (2,8) and (1,7) is 1.
Step-by-step explanation:
The slope of a line can be found using the formula:
m = (Y2 - Y1) / (X2 - X1)
Using the given points (2,8) and (1,7), we can substitute the values into the formula:
m = (7 - 8) / (1 - 2) = -1 / -1 = 1
Therefore, the slope of the line passing through these two points is 1.