Estimate the slope of the graph at the point (x, y). (Each square on the grid is 1 unit by 1 unit.) See Example 1. A rectangular grid of equally sized squares is shown, The grid is 9 squares wide and 9 squares tall. There is 1 curve and 1 line on the graph. The curve enters the window at approximately 2.3 units right of the bottom left corner, goes up and right becoming less steep, passes through 6 units right of and 5.6 units above the bottom left corner touching the line at point (x, y), changes direction at 8 units right of and 6.4 units above the bottom left corner, goes down and right becoming more steep, and exits the window. The line enters the window at 0.8 units above the bottom left corner, goes up and right, passes through 4 units right of and 4 units above the bottom left corner, passes through 6 units right of and 5.6 units above the bottom left corner touching the curve at point (x, y), passes through 9 units right of and 8 units above the bottom left corner, and exits the window