If it lets me ill try and give brain

72

becoz there are 8 rows and 9 columns .

that is 8×9 .

= 72

hope u understood

Step-by-step explanation:

We are going to evaluate a vertex of both forms.

blue shape:

(-5.10)

black shape:

(-1,2)

As one figure is the dilatation of another then:

k (-1,2) = (- 5,10)

From here we know:

-k = -5

Equivalently:

2k = 10

Where we conclude:

k = 5

The scale factor of the dilation is:

k = 5