Question

1. select all that apply: the greek letter delta is used to mean \change in\ △ an airline is never used in math

Explanation:

• In mathematics, the Greek letter $\Delta$ (Delta) is commonly used to represent "change in". For example, in the slope formula \(slope=\frac{\Delta y}{\Delta x}\), \(\Delta y\) means the change in the \(y -\) value and \(\Delta x\) means the change in the \(x -\) value.
• The symbol for the Greek letter Delta is \(\triangle\).
• While there is an airline named Delta, that is not relevant to its mathematical meaning.
• Delta is frequently used in math (as shown in the slope formula example), so the statement "is never used in math" is false.

Answer:

• used to mean "change in"
• \(\triangle\)