The coordinates of a point satisfy the equation of a line if the point is . If a single point satisfies the equations of two lines, the point is , so the lines will at that point. This means that each point where the two lines is a to the system of equations. This means that if you substitute the x- and y-values of the point for x and y in the equations, both equations will be

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)