Final answer:
The degree of the polynomial function f(x) = 5x^2 + 7x - 3 is 2, its leading coefficient is 5, and its end behavior is that f(x) approaches infinity as x approaches both infinity and negative infinity due to its parabolic shape opening upwards.
Step-by-step explanation:
The student is asking about the characteristics of a polynomial function f(x) = 5x^2 + 7x - 3. The degree of this function is 2, since the highest exponent of x is 2. The leading coefficient is 5, as it is the coefficient of the term with the highest exponent. The end behavior of this polynomial is determined by the leading term, 5x^2. As x approaches infinity, f(x) will also approach infinity, and as x approaches negative infinity, f(x) will also approach infinity because the leading coefficient is positive and the degree is even, causing the parabola to open upwards.