Brenda conducts a survey of 100 students to see how their study habits and their grades are related. she wants to see whether students who spend more time on homework have higher grades.
in this situation, which is the independent variable?
a) grades
b) surveys
c) 100 students
d) time on homework

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source: