The area, a, of an ellipse can be determined using the formula a=ttxy where x and y are half the lengths of the largest and smallest diameters of the ellipse. which is an equivalent equation solved for y

Area of an ellipse(a), ,having x and y being the  lengths of the largest and smallest diameters of the ellipse = π xy

  The  lengths of the largest and smallest diameters of the ellipse is called Major Axis and Minor axis of the ellipse.

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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