SubArea: Analyzing function behaviorLevel: BProject ID: 2010013906Source Problem: 2010013905Accepted: 0Clonable: 1Easy: 0Suppose a function is convex up on the interval [−2;1]. Which one of the offered functions has that property?h(x)=−x+5f(x)=x−2(x+5)2g(x)=x2−22xk(x)=−15x3−2x2+x+1