To find the coordinates of point S based on the given description, we start from the origin (0, 0), and move 0.75 units to the left, which corresponds to decreasing the x-coordinate by 0.75. Thus, the x-coordinate will be:
\[ 0 - 0.75 = -0.75 \]
Next, we move 0.5 units up, which means increasing the y-coordinate by 0.5. Hence, the y-coordinate will be:
\[ 0 + 0.5 = 0.5 \]
Combining these two movements, the coordinates of point S are:
\[ (-0.75, 0.5) \]
In fractional form, these coordinates can also be expressed as:
\[ \left(-\frac{3}{4}, \frac{1}{2}\right) \]
So, the correct answer among the options aligns with (Negative three-fourths, one-half).