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Secant lines & average rate of change

Problem

What is the average rate of change of h, left parenthesis, x, right parenthesis, equals, 2, start superscript, x, plus, 1, end superscript over the interval open bracket, 2, comma, 4, close bracket?
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
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