EM-1806

Equation of a straight line

E Math · Secondary 4 · Hard · Equation of a straight line

A line has a negative gradient and cuts both axes at positive values. Its y-intercept is 4 times its x-intercept. Given that the x-intercept is 3, find the equation of the line.

Give your answer in the form

y = mx + c

$y = -4x + 12$
$y = 4x + 12$
$y = -\dfrac{1}{4}x + 12$
$y = -4x - 12$

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