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Mathematics 20 Online
iosangel:

y and x have a proportional relationship, and y = 7 when x = 2. What is the value of x when y = 21?

Vocaloid:

for a directly proportional relationship y = kx plug in 7 for y and 2 for x to solve for x then, once you have your k value, re-use the equation y = kx to find x for y = 21

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