You can enter a line as a linear equation in x and y or in parametric form into the Input Bar. In both cases previously defined variables (e. g. numbers, points, vectors) can be used within the equation.
- Type in
g: 3x + 4y = 2to enter line g as a linear equation.
- You can enter a line in parametric form thus:
g: X = (-5, 5) + t (4, -3)
- Define the parameters m = 2 and b = -1. Then, you can enter the equation
h: y = m*x + bto get a line h in y-intercept-form.
The two coordinate axes are available in commands using the names xAxis and yAxis.
PerpendicularLine[A, xAxis]constructs the perpendicular line to the x-axis through a given point A.