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Saul reads every week. In his first week of reading, he read 50 pages. Each week after that, he read 65 pages. Which expression represents the total number of pages Saul has read, where w represents the number of weeks since he first started reading.

Saul reads every week In his first week of reading he read 50 pages Each week after that he read 65 pages Which expression represents the total number of pages class=

Respuesta :

Given

In first week , he read 50 pages.

After first week , he read 65 pages.

Find

Expression represents the total number of pages Saul has read

Explanation

Let w represents the number of weeks since he first started reading.

Assume y represent number of pages.

when w = 1 then y = 50 ; w = 2 then y = 65+50=115

we know the equation of line

y = mw + c

so ,

50 = m + c .........(1)

and

115 = 2m + c ............(2)

on solving equation (1) and (2) , we get m = 65 and c = -15

so ,

y = 65w - 15

Final Answer

Therefore , the correct option is 3rd