The formula for slope from a graph is given by:
We pick two points from the graph (x, y) at point 1 & (x, y) at another point
We can pick the x-intercept (where the line touches the x-axis) as the first point, we have the coordinate to be (4, 0)
We can pick the y-intercept (where the line touches the y-axis) as the second point, we have the coordinate to be (0, 3)
We substitute these points into the slope equation above, we have:
The slope (m) = -3/4