See the attachment
<h3>Step-by-step explanation:</h3>The solid dot on the right-hand portion of the curve means the function is defined for x ≥ 2. Choices A and C have that condition.
The function is linear for x ≥ 2, so matches selection C, not A.
Answer: Hi! A second order differential equation for the function y(t) has the next shape:
Where p(t), q(t) and g(t) are functions of t.
Then a second order differential equation for y is a differential equation involving the second derivative of y.
Is useful to remember that the order in a differential equation tells us the number of derivations involved in our function, for example, a "third order differential equation" is that involving the third derivative of y, but usually for orders above of two, are called "higher orders differential equations"