Finding the slope of a line

To find the slope of this line, we need to pick two points where the line crosses the grid intersections perfectly.

Let's identify two clear points. I see the y-intercept at zero comma four. Let's mark that as our first point.

Scanning the line to the right, it passes through another grid corner at x equals ten and y equals one. Let's mark that as point two.

The formula for slope is rise over run, or the change in y divided by the change in x.

Let's plug in our values. Our y values go from four down to one, so the change in y is one minus four.