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Home > CC2 > Chapter 7 > Lesson 7.1.5 > Problem 7-60

7-60.

Write the inequality represented by each graph.  

  1. A line graph, shaded on a number line, starts with an open circle on 3, with an arrow pointing left.

    Since the arrow is pointing to the left, that means that all those values are less than the selected point.

    Therefore, any value to the left of is less than . Since the circle above the selected point is open, the point itself is not included and you need to use either or .

  1. A line graph, shaded on a number line, starts with an open circle on negative 1, with an arrow pointing left.

    See part (a).

  1. A line graph, shaded on a number line, starts with a closed circle on negative 2, with an arrow pointing right.

    Notice that this time the circle above the selected point is shaded in, so the point itself is included. That means you will use either or . Since the arrow is pointing to the right, that means that all those values are greater than the selected point.