Question about Texas Instruments TI-84 Plus Calculator
the slope (gradient) of the line as a=(y2-y1)/(x2-x1) where y2=6, y1=5,
x2=3, and x1=1. You should get a=(6-5)/(3-1)=1/2
The equation is y=(1/2)x PLUS b, where b is not known yet.
To find b, substitute the coordinates of one of the points in the equation. Let us do it for (3,6).
The point (3,6) lies on the line, so 6=3/2 PLUS b.
Solve for b: 6 MINUS 3/2=b, or b=9/2=4.5
Equation is thus y=(x/2) PLUS 9/2 =(x PLUS 9)/2
Posted on Oct 20, 2010
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Posted on Jan 02, 2017
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