Go over the x axis up 5 and over the y axis left 1
B C are parellagrams the other are NOT
It like instead of saying 0.0000056 you can write it in a shorter form like 5.6 * 10-6.Its like moving the decimal point between 5 and 6 and multiplying it by the power 10*6. its like how much time you move the decimal point, it will be how much time you say 10 to the power of how much you move it.
Get unknowns on one side and know on other side.
Divide both sides by -2
X= -7