5. Graphing Linear Equations in Slope-Intercept Form
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What information does a slope-intercept form equation give you?
x-intercept: - 6
Graph:
y= 1/2x + 3 The slope is 12 and the y-intercept is 3.
A slope of 12 means that for every 2 units we move in the positive horizontal direction, we move 1 unit in the positive vertical direction. m=rise/run=1/2 To graph the equation, plot the y-intercept and then use the slope to find another point on the line.
Now that we have graphed the given function, we can use our graph to identify the x-intercept. This is the point at which the line intercepts the x-axis.
The line crosses the axis at (-6,0), so the x-intercept is -6.