[slope & rate of change]: what is the slope of this line?

Notice that this slope will be the same if the points (1,3) and (2, 5) are used for the calculations. For straight lines, the rate of change (slope) is constant (always the same). For every one unit that is moved on the x-axis, two units are moved on the y-axis. This is true at any location on the line.

#1: -9/3
#2: -1/4
#3: -3/6
#4: -2/4
#5: 4/2

I really hope these are right! I haven't done slopes in a bit! I hope this helps! :)

1195 was the store owner's profit.

The percent discount was 120