Stephen and Alice are reading the same book for a book club. Stephen reads
278 pages in 7 weeks. Alice reads 31 pages each week. About how many more
pages does Stephen read each week than Alice?
20
70
o
10

10

Step-by-step explanation:

Stephen 278 pages in 7 weeks. Divide 278 by 7 to get 39.71 pages per week.  39.71 rounds up to 40, and 40 is about 10 more than 31.

10

Step-by-step explanation:

Stephen 278 pages in 7 weeks. Divide 278 by 7 to get 39.71 pages per week.  39.71 rounds up to 40, and 40 is about 10 more than 31. :)

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below: