document.write( "Question 143825: This question is from MathXL
\n" ); document.write( "The question is stated as: Find an equation of the line containing the given pair of points. (3,5) and (9,9).
\n" ); document.write( "My first step was to identify x1 x2 and y1, y2 so I had 9-5 /9-3 . My answer to that was 4/6 reduced to 2/3. So to write an equation I was trying to put it in the form of y=mx+b So my question is if the 2/3 is x then how do I now get B? \n" ); document.write( "

Algebra.Com's Answer #104652 by Earlsdon(6294) $\"\"$ $\"About$

You can put this solution on YOUR website!
Your first step is good. The slope, $\"m+=+2%2F3\"$ , so you can initially write:
\n" ); document.write( " $\"y+=+%282%2F3%29x+%2B+b\"$ Now, to find the value of b, you substitute the x- and y-values from either one of the two given points into this equation and solve for b. Let's use the first point (3, 5)
\n" ); document.write( " $\"5+=+%282%2F3%293+%2B+b\"$ Simplify.
\n" ); document.write( " $\"5+=+2+%2B+b\"$ Subtract 2 from both sides.
\n" ); document.write( " $\"b+=+3\"$
\n" ); document.write( "The final equation is:
\n" ); document.write( " $\"y+=+%282%2F3%29x+%2B+3\"$ \n" ); document.write( "

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