Straight-line explorer

<p>The points $X,Y$and $Z$have coordinates $\left( 1,3 \right)$, $\left( -2,-3 \right)$ and $\left( 3,7 \right)$ respectively. Show that $X$, $Y$and $Z$ lies on a straight line.</p>

The points $X,Y$and $Z$have coordinates $\left( 1,3 \right)$, $\left( -2,-3 \right)$ and $\left( 3,7 \right)$ respectively. Show that $X$, $Y$and $Z$ lies on a straight line.

Using Gradient to Prove Collinearity

Using Gradient to Prove Collinearity

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