Need help please identify the lines is it chord, secant, tangent, radius, or diameter.

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]

The graph of f(x), shown below, resembles the graph of g(x) = x2, but it has been changed somewhat. which of the following could be the equation of f(x)?

What is the area of the triangle 10 13 12