answer: 33 ( approx)
step-by-step explanation:
since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )
where,
here given table is,
price ($), x : 18 23 25 29 30 33
pairs sold, y : 16 13 10 8 6 2
so, , , ,
and ,
thus, slop of the given line is,
⇒
⇒ ≈ 33