Answer
No; the two slopes are different, so the points do not lie on the same line.
Work Step by Step
To find if all the points lie on the same line, the slope between each pair of points must be the same.
Use the slope formula: $m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$
The points are $S(-3,4),T(0,2),X(-3,0)$
The slope between $S(-3,4)$ and $T(0,2)$ is: $m=\frac{2-4}{0-(-3)}=$$\frac{-2}{3}$
The slope between $T(0,2)$ and $X(-3,0)$ is: $m=\frac{0-2}{-3-0}$=$\frac{-2}{-3}$=$\frac{2}{3}$
The two slopes are different, so the points do not lie on the same line.
