After direct variation y = -4 when x = -3.
What exactly do we mean by "direct variation"?
- Direct variation equations use the same phrase, to give the reader a hint.
- Either "directly proportional" or "directly varies" is the phrase.
- The area of a square, for example, is proportional to the square of its side.
- If y varies directly as x and y = 6 when x = 2, the variational constant is k = 3.
- As a result, the direct variation equation is y = 3x.
So,
The initial statement is y = kx
Then to find y when x = -3.
- K constant will be y/x ⇒ 4/3
- That is y = kx ⇒ y = 4/3 × x
When x = -3:
Therefore, y = -4 when x = -3.
Know more about direct variation here:
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