The continuous random variable $$\(X\)$$ has probability density function f given by where $$\(k\)$$ is a constant. Sketch the graph of f .

4.1.1 use a probability density function which may be defined piecewise

4.1.3 understand and use the relationship between the probability density function (PDF) and the cumulative distribution function (CDF), and use either to evaluate probabilities or percentiles