The points P, Q, R and S all lie on the same line segment, in that order, such that the ratio of PQ / Q * R / R * S is equal to 1/4 / 1 . If PS = 18 , find QR

answer: 193

explanation:

200-7 = 193

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

-1/3(x+1)^5

i’m pretty sure this is correct