Reflection across the line, y=-x or x=-y
basically, for every x, switch it for y and times -1
for every y switch it for x and tiimes -1
in short, switch the x and y and times both by -1
vertex is(1,-3)
switch
(-3,1)
times -1 to both
(3,-1)
2nd one is answer
The answer to your question is
24
Let's introduce another variable, let 'n' be any Natural Number (numbers from 1 to infinity). The number of pen you can by is given by:
n=30/c
n is your answer in this expression
