Question

I will award you! :)

In the formula for average rate of change, what
does the triangle in front of the x and y stand for?

a. interval between x and y
c. delta notation-change in y over change in x
b. initial value of x and y
d. the percent rate of change of y and x

Answer 1

@SolomonZelman @lacrosseplayer22

Answer 2

Delta notation is used to indicate change: for instance, slope is described as
\[\frac{\Delta y}{\Delta x}\] which means:
\[\frac{y_2 - y_1}{x_2-x_1}\]

Answer 3

another example would be the distance formula:
\[\sqrt{\Delta^2 x - \Delta^2 y} \rightarrow \sqrt{(x_2-x_1)^2-(y_2-y_1)^2}\]

Answer 4

so it would be c?

Answer 5

indeed.