**Title:** Parallel Lines Exploration

**Digital Tool:**
Illuminations

**Web Address URL:**
http://illuminations.nctm.org/Activity.aspx?id=4098

**Standard(s): **

[MA2015] GEO (9-12) 31: Prove the slope criteria for parallel and perpendicular lines, and use them to solve geometric problems (e.g., find the equation of a line parallel or perpendicular to a given line that passes through a given point). [G-GPE5]

**Digital Tool Description:** The data grapher found within the Illuminations website allows students to enter data and then to graph the data in various formats. Once points have been plotted, students can analyze the data and make predictions about the linear functions.