You can leave the TI graphing calculator at home thanks to this web ... and it’s based on the Texas Instruments line of hardware (hence the capital TI). After agreeing that you’re not getting ...

This is shown by the points on the line such as (10, 10) and (-4, -4). Graph A is \(y = -x\). All the coordinates have \(x\) and \(y\) values that are equal in magnitude but with opposite signs.