Question

Using a graphical method, solve the simultaneous equations
y = 2x + 2
and
y=-x-4

Answer 1

`x=-2\,, \ y=-2`

Explanation:

To work out the answer graphically, plot the graphs which i have attached in the screenshot below.

The red is the equation
`y=2x+2` and blue is the equation
`y=-x-4`.

When working out the values which satisfy the equations, we look at the point of intersection (the point where the two graphs meet). I labelled it in green giving our coordinates.

As you can see in the coordinates the x value is -2, but also the y value is also -2. This gives the answer
`x=-2` and
`y=-2` .

Hope this helps!!!