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Secondary 1 | Maths
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sara
Sara

Secondary 1 chevron_right Maths chevron_right Singapore

please help :)) much appreciated

Date Posted: 4 years ago
Views: 286

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Varies directly means that when x increases y also increases.
So, we can write the expression as:
y = ax, where a is a constant.

a) solving the expression. When y= 8, x= 5, so plugging in:
8 = a (5)
a = 8/5
So the expression is y = 8/5 (x)

b) when x = 30
y = 8/5 (30)
y = 48
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Ricky Wiryopranoto
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Esther
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do clarify if you any questions!:)