Question 0111b

Given that the curve with equation ${y=f(x)}$ passes through the points with coordinates ${(-2.9, 8.5),}$ ${(1.7, -1.0)}$ and ${(3.0, -0.6),}$ 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.