Question

Write an equation that represents the situation in the table?

x: y:
6 122
10 170
15 230
28 336

Answer 1

You can almost always write a cubic equation to match 4 arbitrary points. Here, that would be
.. y = -0.00971251x^3 +0.301088x^2 +9.08625x +58.7413

This function agrees with the table when rounded to 3 decimal places.