7. Consider the following points . Y(- 4, - 1) and O(4, 2) Let Y’O’ be the image of overline YO after a reflection across line r. Suppose that Y’ is located at (1, 4) and 0' is located at (- 2, - 4) . Which of the following is true about line r?

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.