Question

How do you use the important points to sketch the graph of `y=x^2 +2x`?

Answer 1

Plug in numbers for the value of `x` and plot them. When plugging in a number for `x`, you get the `y` value, which is the product.

Explanation:

Ok, so I'm guessing you mean how to graph

`y = x^2 + 2x`

If so, you just plug in a number for `x` which could be any number. Let's plug in a few numbers for `x`

Let's plug in `2` for `x`.

`y = 2^2 + 2(2)`

`y = (2 x 2) + 2(2)`

`y = 4 + 4`

`y = 8`

Let's plug in `4` for `x`.

`y = 4^2 + 2(4)`

`y = (4 x 4) + 2(4)`

`y = 16 + 8`

`y = 24`

graph{y=x^2+2x [-10, 10, -5, 10]}