Question: how to find the slope of y=-5x-1?
Answer: if you didn't have an equation, just a graph, and needed to find slope you would use the formula rise/run. Pick a point and count how far you go up the y-axis and how far you move horizontally on the x-axis. the slope would be -5 because the its in y=mx+b form where m is the slope, and b is the y-intercept.