Help me to solve these problem

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

it is 10.6 according to my calculations

answer: the correct option is d.

explanation:

it is given that the triangle j'k'l' shown on the grid below is a dilation of triangle jkl using the origin as the center of dilation.

from the given graph it is noticed that k(4,8) and k'(2,4). let origin is defined by o and scale factor is defined by k, then

    (1)

distance formula,

put these values in equation (1).

therefore scale factor is     and option d is correct.