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Copy of 5.1 Write Linear Equations in Slope-Intercept Form
Transcript of Copy of 5.1 Write Linear Equations in Slope-Intercept Form
When given: m & b
Use slope-int form to write an equation of a line.
You can write an equation
of a line IF you know the y-int & any other point of the line.
Goal: Write equations of lines
Write an equation of the line when slope is -4 and the y-intercept is -8
m = -4
b = -8
y = -4x + (-8)
Y-int = ?
Other point on line = ?
(0, 4) & (1, 2)
Find slope by using:
Y2 - Y1
X2 - X1
2 - 4 -2
1 - 0 1
4 = B
y = -2 + 4