linear func x_y_int_
TRANSCRIPT
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Graphing Linear Equations
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Linear Equation
An equation for which the graph is
a line
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X-intercept
Where the line crosses the
x-axis
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X-intercept
The x-intercept has a y coordinate of
ZERO
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X-intercept
To find the x-intercept, plug in ZERO for y and
solve
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Slope
Describes the steepness of a
line
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Slope
Equal to:
Rise Run
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Rise
The change vertically, the change in y
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Run
The change horizontally or
the change in x
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Finding SlopeStep 1:
Find 2 points on a line
(2, 3) (5, 4)
(x1, y1) (x2, y2)
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Finding SlopeStep 2:
Find the RISE between these 2
points
Y2 - Y1 =
4 - 3 = 1
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Finding SlopeStep 3:
Find the RUN between these 2
points
X2 - X1 =
5 - 2 = 3
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Finding SlopeStep 4:
Write the RISE over RUN as a ratio
Y2 - Y1 = 1
X2 - X1 3
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Y-intercept
Where the line crosses the
y-axis
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Y-intercept
The y-intercept has an x-coordinate of
ZERO
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Y-intercept
To find the y-intercept, plug in ZERO for x and
solve
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Slope-Intercept
y = mx + bm = slope
b = y-intercept
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Step 1:
Mark a point on the y-intercept
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Step 2:
Define slope as a fraction...
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Step 3: Numerator is the vertical change
(RISE)
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Step 4:
Denominator is the horizontal
change
(RUN)
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Step 5:
Graph at least 3 points and
connect the dots