Tip: turn on turbo mode This is a project that graphs a line against an equation inputted. Either you can input an expression (e.g. 2 * x + 4). And it defaults to y = expression, or you can input a whole equation (e.g. x^2 + y^2 = 25), and it will be checked. Unfortunately, the ^, or otherwise known as ** (although you cannot input **), is a bit unreliable, as scratch does not have a block for that. This means that it will glitch with a negative x value, or a negative y value.
Thanks to @Garamol56 for the original project Evaluate Expression, used for the evaluation to check the users position against the equation.