Similarity transformation G consists of a rotation about
the point P by 90°, followed
by a dilation centered at P
with scale factor of r = 2,
and then a reflection across
the line l. Find the image of
the triangle.

Abit confused about what you mean, but i think you might be referring to slope intercept form: y = mx + bin that case b, or the y intercept is already given.(0,-1)find the slope by using the formulay2 - y1/x2 - x1the final slope will be 4/2, equivalent to 2.now your equation should look like thisy = 4/2x -1sorry if this didn’t you out!