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Given LINE GRAPH , SOLVE FOR THE LINE EQUATION

Select two points with known coordinates. Then enter Point 1, P1 coordinate and Point 2, P2 coordinate. Answer is automatic.

Point 1( x₁ , y₁ )

Point 2( x₂ , y₂ )

ANSWER, X Y + = 0 ; written in general form of the equation of a line and in its simpliest form.

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ANSWER, y = x + ; written in standard form, also known as slope-intercept form. With this interactive equation you can do scenario analysis.

When temperature is 40 C, X = 40
x = Then y =

When pressure is 6.5 psi, Y = 6.5
y = Then x =

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Tutorial and Formula Reviewer

y = mx + b ; Equation of a line in slope form ---- Equation 1

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mx - y + b = 0; re-writing equation 1 in the general form Ax + By + C = 0 ----Equation 2

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slope, m = ; slope , m = (y₂ - y₁₎/ (x₂ - x₁) ---- Equation 3

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using point (x₂,y₂) and slope, m, substitutes its values in Equation 1

= * + b ; slope form ---- Equation 1

b =

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