$\text{The slope of the line joining the points } (x_1,y_1) \text{ and } (x_2,y_2) \text{ is given by } m=\dfrac{y_2-y_1}{x_2-x_1}$.So, the slope of the line joining the points \(\left(-3,-2\right)\) and \(\left(6,-9\right)\) is \(\dfrac{\left(-9\right)-\left(-2\right)}{\left(6\right)-\left(-3\right)}\) = \(\dfrac{-9+2}{6+3}\) = \(\dfrac{-7}{9}\) = \(-\dfrac{7}{9}\)The slope is negative, so the line is falling from left to right.