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Direct Variation
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Terms in this set (22)
YES
K=3
Is this a direct variation? YES or NO
If yes what is the direct variation?
NO
Is this proportional? YES or NO
If yes what is the direct variation?
k = 1.5
What is the constant of proportionality? (type k = ___)
y = 0.20x
What is the equation for this direct variation?
y = 4.5x; x = 10
If y = 27 when x = 6, write the direct variation equation and find x when y = 45.
y = 0.5x; y = 10
If y = -7 when x = -14, write the direct variation equation and find y when x = 20.
y = 2x; y = 40
If x = -7 when y = -14, write the direct variation equation and find y when x = 20.
y = 2x; y = 10
If y = 8 when x = 4, write the direct variation equation and find y when x = 5.
y = 0.5x; y = 2.5
If x = 8 when y = 4, write the direct variation equation and find y when x = 5.
y = 6x; x = 7
If y = 36 when x = 6, write the direct variation equation and find x when y = 42.
y = 1/6x; x = 252
y = 1/6x; x = 252 If x = 36 when y = 6, write the direct variation equation and find x when y = 42.
y = -4x; x = -5
If y = -16 when x = 4, write the direct variation equation and find x when y = 20.
y = -1/4x; x = -80
If x = -16 when y = 4, write the direct variation equation and find x when y = 20.
y = -3x; y = -18
If y = -18 when x = 6, write the direct variation equation and find y when x = 6.
y = -1/3x; y = -2
If x = -18 when y = 6, write the direct variation equation and find y when x = 6.
y = 1/3x; y = -8
If y = 4 when x = 12, write the direct variation equation and find y when x = -24.
y = 3x; y = -72
If x = 4 when y = 12, write the direct variation equation and find y when x = -24.
y = 5x; y = 100
If y = 2.5 when x = 0.5, write the direct variation equation and find y when x = 20.
y = 1/5x; y = 4
If x = 2.5 when y = 0.5, write the direct variation equation and find y when x = 20.
y = 1.05x
The number of laps a swimmer swims, y, varies directly with the number of minutes spent
swimming, x. In 50 minutes, the swimmer swims 52.5 laps. Write a direct variation equation
k = $33.75
Jerry rents snowmobiles to tourists. He charges $135 for 4 hours and $202.50 for 6 hours. If the cost varies directly with amount of hours find k, the hourly rate Jerry charges to rent a snowmobile?
y = 3/2
If y varies directly with x, write an equation for the direct variation. Then find each value.
Find y when x = 1, if y = 3 when x = 2.
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