The walker family uses 45 pounds of crisped rice cereal per year. How much do they save by buying the 18 once box for $3.50 rather than the 12 ounce box for $2.75.

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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a reflection across the x axis and a 90 degree rotation left and right.