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4 years ago

Suppose y varies directly with x. Write an equation if y=75when x=25

Mathematics

1 answer:

ser-zykov [4K]4 years ago

6 0

Answer:

y = 3x

Step-by-step explanation:

The standard format of a directly proportional equation goes by the format of y = k × x. The question asks us to write an equation if y = 75 when x = 25 and y varies directly with x.

So we substitute the values y = 75 and x = 25 in the equation y = k × x

K = constant, we have to work this out

75 = k × 25

75 ÷ 25 = k

k = 75 ÷ 25

k = 3

k = 3 So then we put this back into the original y = k × x to find our final equation which is y = 3x

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Answer:

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Step-by-step explanation:

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Answer:

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