Question

Is the line through points P(7, 7) and Q(–5, –5) parallel to the line through points R(–5, –3) and S(0, –1)? Explain.
Select one:
a. No, one line has slope, the other has no slope.
b. No, the lines have unequal slopes.
c. Yes; the lines are both vertical.
d. Yes; the lines have equal slopes.