Linear Functions - Question Set 1

Back to: Investigating Functions using Spreadsheets || Math Units: Contents

The general equation in this section is y = mx

  1. Changing the value of m in cell W4 affects the values in the Y column of the table. Describe the relationship between the X and Y values:

      when m = 1
      when m = 2
      when m = -4

  2. As the value of m changes, there is also an effect on the graph. Describe the direction and steepness of the line:

      when m is small
      when m is large
      when m is negative

  3. What command in cell Y1 would produce a graph with a slope of 5?

  4. What equation produces a graph that is the reflection of the graph of y = 3x in the x-axis?

  5. The point where the graph of a function meets the y axis is called the y-intercept. What is the y-intercept of each of the following:

      y = 3x
      y = 5x
      y = -6x

  6. Why is the y-intercept of functions of the form y = mx always 0?

Please mail comments and suggestions to
Margaret Sinclair