Standard Form Equation:
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The standard form of a linear equation is Ax + By = C, where A, B, and C are integers (usually), and A should be non-negative. This form is useful for analyzing and graphing linear equations.
The calculator uses the standard form equation:
Where:
Explanation: The calculator simply combines your inputs into the standard form equation format.
Details: Standard form makes it easy to find x- and y-intercepts, is useful in systems of equations, and is the preferred form for many algebraic operations.
Tips: Enter the coefficients (A, B), constant (C), and variable names (x, y). The calculator will format them into standard form.
Q1: Should A always be positive?
A: By convention, yes. If A is negative, multiply the entire equation by -1 to make it positive.
Q2: Can A, B, or C be fractions?
A: Yes, but standard form typically uses integers. You can multiply through by the denominator to eliminate fractions.
Q3: What's the difference between standard form and slope-intercept form?
A: Slope-intercept form is y = mx + b, which explicitly shows the slope and y-intercept, while standard form is better for certain calculations.
Q4: How do I find intercepts from standard form?
A: X-intercept: set y=0 and solve for x (x = C/A). Y-intercept: set x=0 and solve for y (y = C/B).
Q5: Can this be used for vertical or horizontal lines?
A: Yes. For horizontal lines (B=0): Ax = C. For vertical lines (A=0): By = C.