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Home > PC3 > Chapter 3 > Lesson 3.2.4 > Problem 3-135


Segment, with 5 tick marks, labeled top, then bottom, from left to right, as follows: 3.5, x subscript 0, 4, x subscript 1, 4.5, x subscript 2, 5, x subscript 3, 5.5, x subscript 4.Consider the values on the -axis and their corresponding subscript values as shown at right.  

  1. Write a linear equation for .

    Write the equation of a linear function using the points and .

  2. Express in sigma notation.

    Use your answer to part (a), making sure your stating index is .

  3. For some function, , express in sigma notation.

    This is similar to your answer to part (b), but using function notation.

  4. How are parts (a), (b), and (c) related?