Which of the following systems of equations can be used to find the quadratic function whose graph passes through the points (1, −2), (2, −4), and (3, −4)? A.
2= a+ b+c4=4a+2b+c4=9a+3b+c

B.
−2=−2a−2b+c−4=−4a−4b+c−4=−9a−3 b+c

C.
−2= a+ b+c−4=4a+2b+c−4=9a+3b+c

D.
1= 4a−2b+c2=16a−4b+c3=16a−4b+c

0.038

step-by-step explanation:

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

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