Find each sum or difference. round to the place of value of the less precise measurement 8.53m - 1.8m

Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2 = 1 and x^2/8^2-y^2/6^2 the foci of both graphs are the same points. the lengths of both transverse axes are the same. the directrices of = 1 are horizontal while the directrices of = 1 are vertical. the vertices of = 1 are on the y-axis while the vertices of = 1 are on the x-axis.

Simply 8x squared + 5(7x squared- x) - 2x =

Which is a graph of a proportional relationship?