Adevelopmental psychologist interested in how television watching relates to reading ability decides to conduct a study. she records the tv watching and reading habits of a group of toddlers in a community. she examines these habits again when the children enter kindergarten and then once more when they complete first grade. she is using the method.

Longitudinal

Step-by-step explanation:

A longitudinal survey consists of a research that implies several repeated observations of the same variables over certain prefined periods of time, in this case the psychologist is repeating in different times (kindergarten, first grade) and measures the same variables over this period of time (reading habits)

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

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