Slope - Zero Slope Versus Undefined Slope
Do your students get confused about whether an answer is zero or undefined? Here is a visual mnemonic to help students remember the difference.
Math Poster - Slope - Zero vs. Undefined
What are positive, negative, zero, and undefined slopes? - Quora
Answer to Solved For each line, determine whether the slope is
Solved For each line, determine whether the slope is
How to Prevent cannot read property split of undefined
undefined ~ A Maths Dictionary for Kids Quick Reference by Jenny Eather
Null and Undefined in Javascript. What's the difference between null and…, by Megan Lo, Webtips
Difference between non-zero value, 0, null & undefined in Javascript
Undefined versus null in JavaScript
