According to a health information website, the distribution of adults diastolic blood
pressure (in millimeters of mercury) can be modeled by a normal distribution with a
mean of 70 and a standard deviation of 20. A diastolic pressure above 100 for an adult
is classified as very high blood pressure. About what percent of adults have very high
blood pressure according to this criterion?

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:

y=mx+