how to extend a straight line through two points to the y-axis of the plane

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ELISABETTA BILLOTTA le 8 Oct 2022

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https://fr.mathworks.com/matlabcentral/answers/1820190-how-to-extend-a-straight-line-through-two-points-to-the-y-axis-of-the-plane

Clôturé : dpb le 8 Oct 2022

I have a graph of this type and I have created the straight line dashed in red that passes through the point of coordinates 0-0 and the point marked with the red dot. now I should extend this line until it meets the y axis, always maintaining the same inclination as the straight line. this is because then I need to identify the coordinates of the points of intersection between the straight line and the other curved lines with values 10-1 and 0.1.

how can I do? can anyone help me?