Can you define the mathematical term conjecture in one sentence ?

Ascatterplot is produced to compare the size of a school building to the number of students at that school who play an instrument. there are 12 data points, each representing a different school. the points are widely dispersed on the scatterplot without a pattern of grouping. which statement could be true

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.

Don't know how to find x given these segment lengths