About 8 sixth graders should be chosen.
Direct proportion is a type of proportionality relationship. For direct proportion, as one value increases, so does the other value and conversely, as one value decreases, so does the other value.
Given that, A population of middle school students contains 160 sixth graders, 180 seventh graders, and 140 eighth graders. Nine seventh graders were part of a random sample of the population chosen to participate in a survey.
We know they are in direct proportion,
Number of sixth graders students = 160
Number of seventh graders students = 180
Number of eighth graders students = 140
If 9 seventh graders were part of a random sample of the population chosen to participate in a survey.
Let the number of sixth graders should be chosen to be 'x'.
Since, there will be direct proportion.
180/9 = 160/x
20 = 160/x
x = 160/20
x = 8
Hence, About 8 sixth graders should be chosen.
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Answer:B-8
Step-by-step explanation:BECAUSE it was for me
(-1, 6)
(-6, -1)
(6, 1)
Answer:
The image of (1,-6) is (-6,-1)
C is correct
Step-by-step explanation:
Given: (1,-6) rotate 270° counterclockwise rotation about the origin.
For 270° counterclockwise rotation about the origin.
(1,-6) lie in IV quadrant.
After 270° counterclockwise rotation about the origin
Point image form in III quadrant.
Hence, The image of (1,-6) is (-6,-1)