Adding another card with value $25 would decrease the standard deviation
because it is closer to the mean the the current standard deviation.
It’s probably 22 because 5 is on two sides and 11 is on two sides so 11 + 11+ 5+5 = 32
542 --> 500
328 --> 300
Estimate: 800
The equation of this line is x = 7 and it's slope is undefined aswell.
Xy - x - y + 1
explanation: distribute (x-1)(y-1) —> x(y-1) - 1 (y-1) —> xy - x - 1(y-1) —> xy - x - y + 1
