document.write( "Question 247583: (1)By looking at a linear equation, how can you tell if the corresponding line is parallel to the x-axis?\r
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Algebra.Com's Answer #180573 by oberobic(2304) $\"\"$ $\"About$

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(1) A horizontal line will be parallel to the x-axis. Since the slope = change in y / change in x, we see that the slope = 0. So y = a number is parallel to the x-axis and is a horizontal line.
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\n" ); document.write( "(2) With a 45-degree angle, x and y change at the same rate. That is, a 45-degree angle cuts a 90-degree angle in half. Imagining how it looks on graph, when we have a change in y of 1, we have a change in x of 1, etc. So the slope is 1. When we have an equation where the coefficient of x is 1, we have a 45-degree angle.
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\n" ); document.write( " $\"graph%28500%2C500%2C-10%2C10%2C-10%2C10%2Cx%29\"$ graph of y=x \n" ); document.write( "

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