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

1 Answer
Jun 29, 2018

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

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

Explanation:

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"