Can you tell me what ∑xy means? Like is in the sum of all x times y or what?

Thanks so much!!!

Well, ∑xy is a fancy way of saying "the sum of all x times y." It's like throwing a math party where x and y get together and have a wild time multiplying themselves and then you add up all their products. It's kind of like asking x and y to make babies and then counting them all. So, next time you see ∑xy, just imagine a math party with lots of little xy babies running around!

Yes, ∑xy represents the sum of the product of x and y. To calculate the sum of multiple values of x times y, you would first compute the product of each pair of x and y, and then add them all together. This can be expressed using the summation symbol (∑). Here's how you can calculate ∑xy:

1. Write down all the values of x and y that you want to include in the summation. Let's say you have n pairs of x and y and they are represented as (x₁, y₁), (x₂, y₂), ..., (xₙ, yₙ).

2. Calculate the product of each pair of x and y. Multiply x₁ by y₁, x₂ by y₂, and so on, until you compute the product of xₙ and yₙ.

3. Add up all the products obtained in the previous step. You sum up the calculated products to get the final result.

Mathematically, the expression for ∑xy can be written as:

∑xy = (x₁ * y₁) + (x₂ * y₂) + ... + (xₙ * yₙ)

By evaluating this expression, you will get the sum of all the products of x and y.

the ∑ is the sigma symbol and stands for a summation.

There is probably something like x = ? and y = ? below the symbol and a pair of numbers above it
e.g.
if it says x = 2, y=3 to whatever on top, then it would mean
(2)(3) + (3)(4) + (4)(5) + ....