Question

A teacher earns $90 weekly and get as$4.5 extra for every extra hour (x) of teaching. The correct equation representing the total income (y) of the teacher is _____.

A
y=90x+4.5
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B
y=94.5+4.5x
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C
y=4.5x+94.5
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D
y=4.5x+90
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Solution

The correct option is D y=4.5x+90Given: Weekly income of the teacher = $90 Extra income for every extra hour of teaching =$4.5 Income for x extra hours = $4.5x Representing the data in form of a table, you get: Extra hours spent (in Hours) Total income (in$) 1 90+4.5×1=94.5 2 90+4.5×2=99 x 90+4.5×x=90+4.5x=y ∴The correct statement representing the total income of the teacher is y=4.5x+90

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