Which is the best approximate solution of the system of linear equations $y=1.5x-1$ and y=1?

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Answer 1 · 2017-01-22T15:50:09

In the question they use the word approximate. This implies they are expecting you to draw the graph and read the answer off from it.

The exact answer is $x=4/3 and y= 1$

For there to be a solution $y=1$ is a common point. So by substitution we have:

$y=1.5x-1 " "->" " 1=1.5x-1$

$1.5x=2$

$x=2/1.5 = 4/3$

So the solution for this is point p $->P_("("x","1")")->(x,y)=(4/3,1)$

Tony B

Which is the best approximate solution of the system of linear equations y=1.5x-1y=1.5x-1 and y=1?