Simplified
There are 6 numbers on a die. So the probability over all to get either of those 6 numbers is 1/6 if you roll just once. The only number that is odd and less than 3 is 1. 1 is one of those 6 numbers so the probability to get a number odd and less than three in 18 rolls is 3/18 which is also 1/6 if it needs to be simplified
substituting the value of x and y in the eqn,
3×-2 - ( 4×-2 + 6×3 )
-6 - (-8 + 18 )
-6 - 10
■ -16
Subtract the y-coordinates: -2 - 3 = -5
Subtract the x-coordinates in the same order: 1 - 1 = 0
slope = (difference in y)/(difference in x) = 5/0
Since the slope ends up as division by zero, and division by zero is undefined, the slope of this line is undefined.
Hint for future:
Vertical line: undefined slope
Horizontal line: zero slope
Line tilts up to the right: positive slope
Line tilts down to the right: negative slope