<h3>y = -8x is the equation of direct variation given that y is 16 when x is -2</h3>
<em><u>Solution:</u></em>
If y varies directly as x, then equation of direct variation is given as:
Where, k is constant of proportionality
From given,
y = 16 when x = -2
<em><u>Substitute in eqn 1</u></em>
Thus the equation of direct variation is:
<em><u>Substitute k = -8 in eqn 1</u></em>
y = -8x
Thus the equation is y = -8x