From 1af14fe98c1ec186d6386f8a779ec724e7d1307d Mon Sep 17 00:00:00 2001 From: eggy Date: Thu, 29 Oct 2020 15:12:59 -0400 Subject: [PATCH] math: use faster interval line --- docs/mhf4u7.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/mhf4u7.md b/docs/mhf4u7.md index b896b0f..a99eab5 100644 --- a/docs/mhf4u7.md +++ b/docs/mhf4u7.md @@ -516,7 +516,7 @@ To identify the positive or negative regions of an equation, an interval line or 1. Factor the equation as much as possible and identify the x-intercepts. 2. Place the x-intercepts on a line. -3. Solve for any value in between two x-intercepts. That region is the sign of the solved value. +3. Find the sign of the end behaviour by taking the sign of the leading coefficient. 4. When crossing an x-intercept, if the degree of that factor is even, the sign stays the same; otherwise, it alternates. 5. Repeat for every other region.