Example 2 write down the equation of the line that

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Unformatted text preview: 4,3) and ( 4, -2 ) . [Solution] Solution Okay, for each of these all that we’ll need to do is use the slope formula to find the slope and then plot the two points and connect them with a line to get the graph. (a) The line that contains the two points ( -2, -3) and ( 3,1) . Do not worry which point gets the subscript of 1 and which gets the subscript of 2. Either way © 2007 Paul Dawkins 160 http://tutorial.math.lamar.edu/terms.aspx College Algebra will get the same answer. Typically, we’ll just take them in the order listed. So, here is the slope for this part. m= 1 - ( -3 ) 1 + 3 4 = = 3 - ( -2 ) 3 + 2 5 Be careful with minus signs in these computations. It is easy to lose track of them. Also, when the slope is a fraction, as it is here, leave it as a fraction. Do not convert to a decimal unless you absolutely have to. Here is a sketch of the line. Notice that this line increases as we move from left to right. (b) The line that contains the two points ( -1,5 ) and ( 0, -2 ) . Here is the slope for this part. m= [Ret...
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