What is the slope of a line parallel to the line with equation $y = -2x + 7$?
A$-2$
B$\dfrac{1}{2}$
C$2$
D$7$
Answer & Solution
Correct answer: A. $-2$
Parallel lines have **equal** slopes. The given line's slope is the coefficient of $x$: $-2$. So any line parallel to it also has slope $-2$.
- Trap B ($1/2$) is the slope of a **perpendicular** line (negative reciprocal).
- Trap C drops the negative sign.
- Trap D returns the $y$-intercept.
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