Answer my math question I asked so many times I lost most of points by

The cost c, in dollars, for bananas depends on the weight w,in pounds, of the bananas. this situation is represented by the function rule c=0.5w (graph each function rule.tell whether the graph is continuous or discrete)

How can you tell when x and y are not directly proportional?

How many zeroes do we write when we write all the integers 1 to 243 in base 3?