Question 85632
One approach is to plot the given points (x, y) on coordinate graph paper and then work out the equation for the line or curve.
Let's see what the graph might look like when we plot the given points:
(x, y)
------
(2, 3)
(3, 7)
(4, 11)
(5, 15)
{{{graph(300,200,-5,5,-5,20,4x-5)}}}