Using the data below, what is the slope coefficient from a regression of Quantity on Price? It is probably easiest to use either Gretl or Jamovi as in the powerpoint example. (round your answer to the nearest 0.1, and it can be either positive or negative.)

Quantity	Price
0	82
23	79
36	69
44	67
45	56
61	34
53	27
66	23
71	27
88	24