Calculate the slope at point A and at point B . Calculate the slope across the arc AB . Use the following table to work Problems 21 to 23. The table gives data about umbrellas: price, the number...

Calculate the slope at point A and at point B .

Calculate the slope across the arc AB .

Use the following table to work Problems 21 to 23.

The table gives data about umbrellas: price, the number purchased, and rainfall in millimetres (mm).