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In the xy-plane, ten points are selected from the line with equation y = 0.8x - 24. If the range of the y-coordinates of the ten points is 7, what is the range of the x-coordinates of the ten points?
  • a)
    3.2
  • b)
    6.25
  • c)
    8.75
  • d)
    9.4
  • e)
    11.75
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
In the xy-plane, ten points are selected from the line with equation y...
Let the first term be x1 and the last term be x10 
0.8x− 24____________0.8x10 − 24 
We know that
0.8x10−24 − (0.8x− 24) = 7 
0.8x10 − 24−0.8x1+24 = 7
0.8(x10−x1) = 7
x10 − x= 7∗10/8 
x10 − x1 = 8.75 
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