Find the slope of the line passing through each of the following pairs of points. (0, 0), (4, 3). PLZ HELP ITS RSM

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?