Slope in a table - Questions

1. What is the slope of the line that contains these points?

x 5 6 7 8
y -5 -6 -7 -8


2. What is the slope of the line that contains these points?

x -7 -4 -1 2
y -7 14 35 56


3. What is the slope of the line that contains these points?

x -4 -3 -2 -1
y 2 5 8 11


4. What is the slope of the line that contains these points?

x 31 36 41 46
y 10 8 6 4