The distance between (-2, -5), (3, 5) what is it

The difference between the x-values is 5. 
The difference between the y-values is 10. 
Make a triangle with these points. 
The distance is the hypotenuse. 
Use the pythagorean theorem to get the distance. 
Square 5 and 10 to get 25 and 100. 
Add them together to get 125. 
Find the square root of 125. 
It is approximately 11.2 units. 
Hope this helps!

The scale factor of what ?

Step 1: 6x-10=1; step 2: 6x=11