1. In a sales report of one company, the marketing division displayed a series of data that correlated sales (y) with the quantity of flyers (x). The data are represented in the following table. Table 3 Sales Quantity of Flyers 23 69 29 95 29 102 35 118 42 126 46 125 50 138 54 178 64 156 66 184 76 176 78 225 (a) Test whether there exists correlation between sales and quantity of flyers using a = 0.05. ( 16 ) (b) Based on your answer in (a), comment the overall relationship between sales and quantity of flyers. (4) ( Total / Jumlah: 20 )