The scatter plot shows the price, in cents, of a postage stamp used to mail a letter in United States for the years from 1958 to 2014. Also shown is the line of fit to model the dataThe equation of the line of fit is y = - 0.71 + 0.86x , where represents the predicted price, in cents, of a stamp and x represents the number of years since 1958. (S& S-ID.3.8-9 )PLS HELP!!

6/20

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

i those same problems in math and dont know how to do them

answer is b.

15

i got this one as well.