Which relation is a partial variation
1 answer:
Answer:
<h2>D) y = 2x - 5</h2>Step-by-step explanation:
A partial variation is defined as a relation which has the form , where
is the slope and
is the y-intercept.
So, by definition, the right answer is D) y=2x-5, it's a partial variation, and it doesn't pass through the origin of the coordinate system.
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Answer:
see explanation
Step-by-step explanation:
Given that M is directly proportional to r³ then the equation relating them is
M = kr³ ← k is the constant of proportion
To find k use the condition when r = 4, M = 160, thus
160 = k × 4³ = 64k ( divide both sides by 64 )
2.5 = k
M = 2.5r³ ← equation of variation
(a)
When r = 2, then
M = 2.5 × 2³ = 2.5 × 8 = 20
(b)
When M = 540, then
540 = 2.5r³ ( divide both sides by 2.5 )_
216 = r³ ( take the cube root of both sides )
r = = 6