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Interval Change in .f(x) Change in g() Change in h(x) Change in k(c) 2.1 2.1 2.1 2.1 2.0 3.2 2.0 3.2 2.1 4.2 2.1 4.2 2.2 5.1 4.2 5.1 2.1 6.3 4.1 4.2 2.2 7.2 4.2 3.2 2.0 8.3 4.0 2.1 The table gives the average rates of change for the functions f, g, h, and k for certain intervals of x. Which of the functions is best modeled by a piecewise-linear function with two linear segments with different slopes?