They are intersecting lines if they are not parallel so the other option is that they are intersecting.<span />
Locate two corresponding ordered pairs of the two shapes. Calculate how much the pre-image values were multiplied by to obtain the image values. This is your scale factor. You can calculate this by dividing the coordinates of the mage by the corresponding coordinates of the pre-image.
This will be an infinite solution because at the end of the problem it will give you 7x=7x.
I hope this helps :)
