Please help as soon as possible! Which two points have an undefined slope?
a.
(-1,1) and (1,-1)
b.
(-2,2) and (2,-2)
c.
(-3,-3) and (-3,3)
d.
(-4,-4) and (4,4)

Asap the total attendance for all of a baseball league in 2012 was about 7.5×107 fans, while the attendance for the tornadoes in 2012 was about 1.5×106 fans. about how many times more was the attendance for the entire baseball league than the attendance for just the tornadoes? 50 times more 10 times more 2 times more 5 times more

How do you summarize data in a two-way frequency table?

What is the difference between regular convex and concave polygons