Which system of equations is represented by the graph?
a) y= x2 − 6x − 7
x − y = 1

b) y = x2 − 6x + 7
x + y = −1

c) y = x2 + 6x − 7
x − y = 1

d) y = x2 + 6x + 7
x + y = 1

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