The sum of the series below is 10900 how many numbers n are in the series 19+20.5+22+23.5++181

Consecutive terms differ by 1.5, so this is an arithmetic sequence given by

So we have

and so on, up to

The sum of the first terms is 10,900:

(we ignore the negative solution)

so there are 109 terms in the series.

Step-by-step explanation:

y= 2x+7

changed to y= 5x +7

as slope is increased from 2 to 5

therefore it would be less steeper

so, option d) is correct

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