Triangle pqr is transformed to similar triangle p'q'r'. a coordinate grid is shown from negative 10 to 0 to positive 10 on both x- and y-axes at increments of 1. a triangle pqr has p at ordered pair 4, negative 4, q at 8, negative 4, r at 4 and negative 8. a polygon p prime q prime r prime has p prime at ordered pair 2, negative 2, q prime at ordered pair 4, negative 2, r prime at ordered pair 2, negative 4. what is the scale factor of dilation? 1 over 2 1 over 3 1 over 4 1 over 5

How many groups are there?

Ok here we go ..there are plenty of ways to solve such math problems but we will go for the smartest and easiest ..5x+2y=7  -2x+6y=9we rearrange them into the following ..by multiplying the 1st equation by 2 it becomes 10x + 4y = 14we rearrange it and so it becomes 10x = 14 - 4yas for the second equation we multiply it by 5 and rearrange it so it becomes as to the following ..-10x + 30y = 45rearranging so 10x = 30y -45now 10x equals both 14 - 4y and 30y -45so   14 - 4y = 30y -4531 = 26yy= 31/26 = 1.19 or around 1.2so by now we can calculate x easily as  -2x+6y=9so 2x = 6y -9 = 6 * 31/26 - 9 = -1.84  then x = - 0.92 or around -0.9best luck!