Answer:
First Picture: -2/7
Second Picture: 9/5
Third Picture: 5/3
Not sure of the others
Step-by-step explanation:
Pick two points on the line and determine their coordinates.
Determine the difference in y-coordinates of these two points (rise).
Determine the difference in x-coordinates for these two points (run).
Divide the difference in y-coordinates by the difference in x-coordinates (rise/run or slope).
180 minus 90 equals 90, divided by 2, the answer is 45 degrees
They use percents less than one to get the the exact number