Question 0111b

Given that the curve with equation ${y=f(x)}$ passes through the points with coordinates ${(-1.1, -1.1),}$ ${(0.8, 1.9)}$ and ${(3.7, 19.8),}$ find the values of ${a,b}$ and ${c.}$ Give your answers correct to 3 decimal places.

Find the set of values of ${x}$ for which ${f(x)}$ is an increasing function.