Find the rate of change between the two points: (8, 1) and (4, 2) where x is in months and y is in inches. 25 inches per month -.25 inches per month 4 inches per month -4 inches per month

The answer is -4 inches per month

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