Chris can choose plan a or plan b for his long distance charges. For each plan, cost (in dollars) depends on minutes used (per month) as shown below

(The whole question can be seen in the Attachment)

(a) Plan A , $6

(b) 160 minutes, Plan B

Explanation:

If Chris makes 40 mins of calls for the month, which plan costs less?

In the graph, it can clearly be seen that for 40 mins, Plan A costs $4 while Plan B costs $10. So Plan A costs less.

How much less does it cost than the other plan?

Plan B cost $10 while Plan A costs $4. So Plan A costs $10-$4=$6  less than plan B

For what number of minutes both plans have the same cost?

We can see from the graph that both plans A and B coincide at 160 mins where the cost of both plans become $16

If the time spent on calls is more than this amount, which plan cost less?

Plan B costs less after time spent on call exceeds 160 mins.

can you give us the options

answer; /// the above statement is (true);