## Detailed description

- f(x) = x to the power 2, convex parabola with turning point at (0,0).
- f(x) = −2(x − 3)squared + 8, concave parabola with turning point at (3,8), intersects x-axis at (1,0) and (5,0) and the y-axis at (0,−10).

- f(x) = x to the power 2, convex parabola with turning point at (0,0).
- f(x) = −2(x − 3)squared + 8, concave parabola with turning point at (3,8), intersects x-axis at (1,0) and (5,0) and the y-axis at (0,−10).