Update README.md

Author: maxwitanowski

README.md

@@ -2,6 +2,6 @@ This app is currently under development, it is open source, feel free to use the
 
 INSTRUCTIONS:
 
-Input a linear equasion into the field in the top left in the format y = x + or - b
+Input a linear equation into the field in the top left in the format y = x + or - b
 
 To input a quadratic equasion, use the quadratic fields inputting three different numerals. If coming from an equasion the numerals inputted (a, b, c) can be derrived from the following form of equasion: **a**x^2+**b**x+**c** = 0