Edward C. answered • 03/11/15

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f(x) is a straight line with a slope of 2 and a y-intercept of -1. The x-intercept is 1/2.

g(x) is a straight line with a slope of -2 and a y-intercept of -1. The x-intercept is -1/2.

For linear functions the domain and range are always all real numbers so f(x) and g(x) have the same domain and range.