A line has a y-intercept of -21 and a slope of 4 . Find the equation of the line.

y = 4x - 21

Step-by-step explanation:

General equation of a line is y = mx + c

where y and x are coordinates of the line.( x,y ).

m is the gradient / slope of the line.

c is the y-intercept.

By substitution

y = 4x - 21

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:

351°f

step-by-step explanation: