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Question

# The given graph shows the relation between the temperature and the time for metal 1 and metal 2. is the suitable equation for metal 2.

A
y = 2x
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B
y = 3x
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C
y = 7x
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D
y = 3.5x
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Solution

## The correct option is C y = 7xEquation of metal 1 ⟹y=4x Slope of metal 1 = yx=4 The temparature per minute of metal 1 is =4 The temparature per minute of metal 2>4 Slope of metal 2>4 From the options y = 2x : Slope = yx=2 y = 3x : Slope = yx=3 y = 3.5x : Slope = yx=3.5 y = 7x : Slope = yx=7 Only one option where slope is greater than 4 ∴equation of metal 2 is y=7x.

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