Determine the equations of the straight line and the parabola shown in the graph.

Step 1: Identify known points and functions.
From the graph:

• The straight line passes through P and E.
• P is the y-intercept of the line. From the markings, P is at $(0, 4)$.
• E is the x-intercept of the line. From the markings, E is at $(2, 0)$.
• The parabola passes through the origin O $(0, 0)$.
• Point N is on the parabola, with an x-coordinate of 1. From the graph, its y-coordinate appears to be 1. So, N $(1, 1)$.
• Point M is on the parabola, with a y-coordinate of -2.