1. The table shows Angelica’s scarf sales, in dollars, for the first 16 wk she was in business.

Time (wk) Sales ($)
1 190
2 220
3 200
4 330
5 300
6 410
7 450
8 410
9 530
10 650
11 570
12 650
13 750
14 720
15 700
16 800

(a) Create a scatter plot of the data. (b) Do the points appear to follow a linear pattern? If so, is the correlation positive or negative?