Question

8. Is the line through points P(–7, 2) and Q(7, –6) parallel to the line through points R(–1, –5) and S(–3, –1)? Explain. (1 point)
No; one line has zero slope, the other has no slope.
Yes; the lines are both vertical.
Yes; the lines have equal slopes.
No; the lines have unequal slopes.


10. Plans for a bridge are drawn on a coordinate grid. One girder of the bridge lies on the line y = –9x – 9. A perpendicular brace passes through the point (–1, 7). Write an equation of the line that contains the brace. (1 point)
y – 1 = –(x + 7)
x – 7 = –9(y + 1)
y – 7 = (x + 1)
y – 7 = –9(

Answer 1

Yes; the lines have equal slopes