12 out of 15 students play in the school band. In a class of 45 students, how many do NOT play in the band? |
1 answer:
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The x-value increases by a factor of 5 from 1.6 to 8 between the two points. Because the variation is inverse, the y-value must decrease by a factor of 5 between the two points.
6/5 = 1.2
The second point is (8, 1.2), corresponding to the 4th selection.
6/5 = 1.2
The second point is (8, 1.2), corresponding to the 4th selection.
Now all you have to do is divide -3x by -2 and 18 by -2 which would be:
Y= 3/2x-9
Y= 3/2x-9