Me idk when i take a picture it always shows random stuff not this

Which of the following graphs could represent a cubic function?

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?