Slope of two lines

Question

Given below are descriptions of two lines.

Line 1: Goes through  and 

Line 2: Goes through  and 

The slope of Line 1 is    

The slope of Line 2 is    

Answer 1

slope of L1 = (11+117)/(-85-15) = 128/-100 = -1.28

slope of L2 = (9-5)/(8+24) = 4/32 = 1/8

slope is the difference in y coordinates divided by the corresponding difference in x coordinates