For a party, Sue bought plastic plates for $3.65, cups for $4.25, three boxes of plastic tableware for $0.99 each, and a plastic tablecloth for $6.75. Sales tax is 5.5%. What is the total cost for Sue’s purchases, including tax?

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

the opening of this porabola is facing up

step-by-step explanation: