Question

5.If quantities X and Y both increase or decrease simultaneously, then X & Y are called ........​

Answer 1

Answer:

directly proportional

Answer 2

$If \: x \: and \: y \: are \: any \: two \: quantities$

$such \:that \:both \:of \:them \: increase \:or$

$decrease \: simultaneously , \:then \: x \:and$

$y \: are \: called \: \underline{\pink{ Direct \: Proportion . }}$

$This \:can \:be \: written \: as \: x \propto y$

$and \: read \:as \: x \: is \: directly$

$proportional \:to \: y .$

$\therefore \frac{x}{y} = k \implies x = ky$

$where \: k \:is \: constant \: of \: Proportion$

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