triangle jkl and LMN are similar right triangles which proportion is true for the slopes of JL and LN
we know that
If two triangles are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent
In this problem
triangle JKL and tringle LMN are similar
that means
JK/LM=KL/MN=JL/LN
The image of the question is needed to complete the answer