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Direct variation
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- Lesson: 57:31
Direct variation
Lessons
Direct Variation:
y varies directly with x with a constant variation of k
y=kx
wherek≠ 0
y varies directly with x with a constant variation of k
where
- 1.Identifying direct variations by table of values
Do the following tables of values represent direct variation? - 2.Identifying direct variations
Which of the following represent direct variation?
A. y = 2
B. y = 3.1x
C. y=−97x
D. xy = 191
E. y = 8x + 5 - 3.Variable y varies directly with x. Determine m and n
- 4.If a varies directly as b, and b = 4 when a = 16, find a when b=23
- 5.If the volume of an object varies directly as the cube of its height, and the volume equals 40ft3 when the height is 2ft, find the object's volume when its height equals 31ft