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Mathematics 8 Online
OpenStudy (volleyballlover55):

HELP!

OpenStudy (volleyballlover55):

@kgrendel0324

OpenStudy (volleyballlover55):

A candle burns down at the rate of 0.5 inches per hour. The original height of the candle was 9 inches. Part A: Write a list of 6 ordered pairs to show the height of the candle in inches (y) as a function of time in hours (x) from the first hour after it started burning. For example, the point (0, 9) would represent a height of 9 inches after 0 hours. Explain how you obtained the ordered pairs. (5 points) Part B: Is this relation a function? Justify your answer using the list of ordered pairs you created in Part A. (2 points) Part C: If the rate at which the candle burned was 0.45 inches per hour instead of 0.5 inches per hour, would the relation be a function? Explain your answer using input and output values. (3 points)

OpenStudy (volleyballlover55):

?

OpenStudy (kgrendel0324):

Part A; (0,9) 9 inches after 0 seconds,(2,8) 8 inches after 2 seconds,(4,7) 7 inches after 4 seconds,(6,6) 6 inches after 6 seconds (8,5) 5 inches after 8 seconds (10,4) 4 inches after 10 seconds (12,3) 3 inches after 12 seconds. The equation to find the ordered pairs in y= -0.5x +9

OpenStudy (volleyballlover55):

@kgrendel0324 ok so the answer for part A is?

OpenStudy (kgrendel0324):

yes

OpenStudy (volleyballlover55):

well what is it?

OpenStudy (volleyballlover55):

is it this: Part A; (0,9) 9 inches after 0 seconds,(2,8) 8 inches after 2 seconds,(4,7) 7 inches after 4 seconds,(6,6) 6 inches after 6 seconds (8,5) 5 inches after 8 seconds (10,4) 4 inches after 10 seconds (12,3) 3 inches after 12 seconds. The equation to find the ordered pairs in y= -0.5x +9

OpenStudy (kgrendel0324):

Part B; yes the relation is a function, non of the x values repeat.

OpenStudy (volleyballlover55):

ok and part c?

OpenStudy (kgrendel0324):

Yes that is part a, and that is part b.

OpenStudy (volleyballlover55):

ok! and part c?

OpenStudy (kgrendel0324):

Part C; Yes the relation would still be a function because the values would never repeat as long as they have a constant rate of change. (0,9)(1,8.5)... and so on.

OpenStudy (kgrendel0324):

Medal

OpenStudy (volleyballlover55):

amazing!!! your the best! thanks so much :) you definelty deserve a medal :)

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