<p>tx + y = -3
The equation above is the equation of the xy-plane, and t is constant. If the slope of the line is -10, what is the value of t?</p>
<p>t=10..i believe</p>
<p>Comparing with the equation y = mx + c, where m = gradient/slope,
tx + y = -3
=> y = -3 -tx
Since m=-10=-t,
t=10</p>