Find the slope from two points

Use the slope formula to compute rate of change from coordinate pairs.

Do this: Read the concept below, then try the quiz or activity.

Lesson 56 of 192

29%

Concept

Objective: Students will calculate slope from two points and interpret the result.

Estimated Time: 12 minutes

Standards:

HSF-IF.B.6HSA-CED.A.2

Slope formula m = (y2 - y1)/(x2 - x1) compares vertical and horizontal change between two points.

Find slope through (-2, 5) and (3, -5).

Slope through (1,2) and (4,8) is:

What causes slope sign errors?

Simplifying fractions

Inconsistent subtraction order

Using parentheses

Using decimals

Common Misconception

Always verify your result in context instead of trusting a first pass.

These steps are out of order — can you fix them?

1.Simplify numerator/denominator

2.Substitute into formula

3.Label points

4.Interpret sign/value

How can you check a slope value quickly?

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Question 1