Fill in the blanks to make the statements true:
When two quantities x and y are in ………. Proportion or vary ………… they are written as x ∝ y.
When two quantities x and y are in direct proportion or vary directly, they are written as 
.
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Fill in the blanks to make the statements true:
When two quantities x and y are in ………. Proportion or vary ………… they are written as x ∝ y.
When two quantities x and y are in direct proportion or vary directly, they are written as .