Answer - Andrea is NOT correct.
I can explain it best by suggesting both Andrea and Blake start with 10 marbles.
If Andrea gave one (1) marble to Blake, Andrea now has 9 and Blake has 11.
Starting from the y-intercept of ![\displaystyle [0, 2],](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5B0%2C%202%5D%2C)
you do 
by either moving two blocks <em>north</em> over three blocks <em>west</em> or two blocks <em>south</em> over three blocks <em>east</em> [<em>west</em> and <em>south</em> are negatives].
I am joyous to assist you anytime.
$4.15n - ($250 + $2.45n)
Now that we have our expression, let's set it greater than or equal to 0
$4.15n - ($250 + $2.45n) >= 0
Let's simplify the left side.
$4.15n - $250 - $2.45n >= 0.
Combine like terms.
$1.7n - $250 >= 0
Add $250 to both sides.
$1.7n >= $250
Divide both sides by $1.7
n >= 148
You would need to make 148 light sabers to make a positive profit.
19 is the distance between those 2
