What is the slope of the line through (−1,−7) and (3,9)?

The slope is 4.

Step-by-step explanation:

Point slope form is y-y1 over x-x1. I put the coordinates in like this.

9-(-7) over 3-(-1) so thats 9+7 over 3+1. 16 over 4 is 4.

The answer is 2

Step-by-step explanation:

A useful formula for finding the effective interest rate on discounted notes is
.. (effective rate) = r/(1 -rt)

The time period appears to be
.. t = (15 weeks)*(7 days/week)*(1 year)/(365 days) = 21/73 year ≈ 0.28767 year

Then the effective rate is
.. (effective rate) = 7%/(1 -0.07*0.28767) ≈ 7.14%