Pre-image point N(6, -3) was dilated to point N'(2, -1). What was the scale factor used?
2 answers:
Answer:
Scale Factor = (-4,2)
Mid-point = (-3, 3/2)
Step-by-step explanation:
Let X = (x,y) be the scale factor by which the point was dilated. Using this assumption we can write that:
N+X=N^'
(6,-3)+(x,y)=(2,-1)
(6+x,-3+y)=(2,-1)
Putting the coordinates equal one by one:
For x-coordinate:
6+x=2
x=2-6
x= -4
For y-coordinate:
-3+y= -1
y= -1+3
y=2
So the scale factor was:
(-4,2)
For the mid-point of (-8,5) and (2,-2)
Mid-point=((-8+2)/2,(5-2)/2)
=((-6)/2,3/2)
=(-3,3/2)
Question 1
Let the scale factor be k.
Then, we have the mapping

This implies that:

We equate any corresponding component find the value of the scale factor k.
6k=2


Hence the scale factor is 
Question 2:
The midpoint of any two points can be calculated using the formula;

We want to find the midpoint of (-8, 5) and (2, -2).


The midpoint is:

You might be interested in
Answer:
21,120 feet
Step-by-step explanation:
1 yard is = 3 feet so you multiply 3 by 7,040
Which is 21,120
Answer: 21,120
Hope this helps!
Answer:

Step-by-step explanation:





6 miles that is rounded up
Y=1.47x
X is the number of erasers bought