I need help on my home work ​

Which of the following is true for the relation f(x)=2x^2+1

Can someone me out here and the tell me the greatest common factor

Look at the hyperbola graphed below. the hyperbola gets very close to the red lines on the graph, but it never touches them. which term describes each of the red lines? o o o o a. asymptote b. directrix c. focus d. axis