Question:
A river's water levels at different points are plotted on a coordinate plane. At point (4, 20) and point (6, 30), the river level rises. Calculate the difference in the river level from point (4, 20) to point (6, 30).
A river's water levels at different points are plotted on a coordinate plane. At point (4, 20) and point (6, 30), the river level rises. Calculate the difference in the river level from point (4, 20) to point (6, 30).