Posted by chchch on Saturday, July 14, 2012 at 12:56pm.
Need help with domain and range
how do you find the domain and range of
y=x+8.
after that one how do you find the domain and range of 7x+y=1

Math  Steve, Saturday, July 14, 2012 at 2:37pm
the domain of all polynomials is all real numbers
the range of all linear equations (with nonzero slope) is all real numbers.
Think about it. You have a straight line that extends all the way in both directions. Assuming it is not horizontal, then there is no value for either x or y that does not have a point on the line.

Math  chchch, Saturday, July 14, 2012 at 4:18pm
but how do you know if an equation is a straight line or not
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