If there is a graph with a line going through (-1, -1), (0, 0), (1, 1), (2, 2) What is the domain and range?

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Answer 1 · 2018-06-29T23:41:24

Domain: $(-oo, oo) " or all Reals"$

Range: $(-oo, oo) " or all Reals"$

Given: a line that goes through $(-1, -1), (0,0), (1, 1), (2,2)$

The slope of the line $m = (y_2-y_1)/(x_2-x_1) = 1$

The $y$ -intercept is the point $(0, b) = (0, 0) => b = 0$

Equation of the line: $y = x$

All line equations have the same domain and range:

Domain: $(-oo, oo) " or all Reals"$

Range: $(-oo, oo) " or all Reals"$