This week in Math 10 I learned how to get the X and Y intercepts from a General Form equation.
General Form is pretty useless. It doesn’t tell you much about anything; however, it is good for finding X and Y intercepts.
Example: 3x – 5y + 60 = 0
To find the X intercept, first we must cancel out the Y, giving us 3x + 60 = 0.
Then we need to cancel out the 60; we do this by subtracting 60, which we need to do to both sides of the equation.
3x +60 = 0
3x = -60
Then we need to isolate X. To do this, we divide 3x and -60 by 3.
x = -20
To get the Y-intercept, simply do the same thing, but instead of canceling out the Y, cancel out the X. Cancel out the integers and do so to both sides, the same thing; Then, divide both sides by the Y value instead of X.
It will look like this:
3x – 5y + 60 = 0
-5y + 60 = 0
-5y = -60
Y = 12