Question

the supervisor at north street metro station keeps track of the ticket sales. this scatter plot shows the afternoon temperature and the number of tickets sold on several days last year.
north street ticket sales
scatter plot with x-axis temperature (°f) from 10 to 100, y-axis number of tickets sold from 1,000 to 10,000
in total, how many tickets were sold on the days when the afternoon temperature was less than 30°f?
blank tickets

Explanation:

Step1: Identify relevant points

Find points where x < 30°F: at x=20 (y=9000) and x=30 (y=8000? No, x=30 is not less than 30; correct points: x=20 (9000) and x=~25? Wait, check again: the scatter plot has points at x=20 (y=9000), x=25 (y=8000), x=30 (y=6500? No, x<30 means x≤29. So x=20 (9000) and x=25 (8000).

Step2: Sum the ticket counts

Add the y-values: 9000 + 8000 = 17000.

Answer:

17000