Without an equality sign the given expression is not an equation
y=x^3
If you mean y = x+5 and x is -1 then y = 4
If you mean: y = x+4 then the perpendicular equation can be y = -0.5x+4
Without a second independent equation, it's not a 'system' yet.
There isn't any. " yx-1 " is not an equation.
It generates a hyperbolic paraboloid.
yx-3 is not an equation, and it has no graph.
Without an equality sign the given expression is not an equation
y=x^3
yx - 8 is an expression, not an equation nor an inequality. Consequently it cannot be graphed and so cannot have an intercept.
If you mean y = x+5 and x is -1 then y = 4
You can graph an equation or an inequality but you cannot graph an expression.
If you mean: y = x+4 then the perpendicular equation can be y = -0.5x+4
It would be y = 6x.
Without a second independent equation, it's not a 'system' yet.
Without an equality sign the given expression can't be considered to be a straight line equation.