Degree of a polynomial is determined by the maximum value of an exponent in the polynomial.
7 = 7x0⟹ degree = 0
2x ⟹degree = 1
7x2+5x⟹ degree = 2
3x3+2x⟹ degree = 3
9x4+3⟹, degree = 4
The order in which degree increasing is
1. 7
2. 2x
3. 7x2+5x
4. 3x3 + 2x
5. 9x4+3