A line that passes through (-3, 9) and (-3, 4) will most likely be a line that is A horizontal
B vertical
C steeper than a line with a slope of 2
D steeper than a line with a slope of -5

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?