How many possible combined page count and color choices are possible? how does it this relate to the number of page size

Which of the following graphs could represent a cubic function?

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given

2x + 3y = 17 5x + 6y = 32 usibg method if elimination