My daughter with ratio table homework. i do not understand the concept of the tables. here is one of her questions that she has to answer in a table.
a book store bought 160 copies of a book from the publisher for $4000. if the store gives away 2 books, how much money will it lose?

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl