$179.50 that was marked 10% off how much did she pay for the i-pad

Discount = Original Price x Discount %/100

Discount = 179.5 × 10/100

Discount = 1795/100

You save = $17.95

Final Price = Original Price - Discount

Final Price = 179.5 - 17.95

Final Price = $161.55

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