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Functions and commands 371
Linear Explorer functions
SolveForSlope • Input: enter two coordinates of the line: x2, x1, y2, y1
• Output: Slope of the line: m = (y2–y1)/(x2–x1)
• Example: SolveForSlope(3,2,4,2) yields 2
SolveForYIntercept
• Input: x, y, m (that is, slope)
• Output: y-intercept of the line: c = y–mx
• Example: SolveForYIntercept(2,3,–1) yields 5
Quadratic Explorer functions
SOLVE Input: a, b, c where a, b, c are the constants in ax
2
+bx+c=0
Output: Solves the equation to determine the value of x:
(–b+-d)/2a where d = √(b
2
–4ac)
Example: SOLVE(1,0,–4) yields {–2,2}
DELTA Input: a, b, c where a, b, c are the constants in ax
2
+bx+c=0
Output: Discriminant/Delta of the equation: D = b
2
–4ac
Example: DELTA(1,0,–4) yields 16
Common app functions
In addition to the app functions specific to each app, there are
two functions common to the following apps:
• Function
• Solve
• Parametric
• Polar
• Sequence
• Advanced Graphing