Hey can you me posted picture of question

For this case we have the following expression:
 9x2-64 = 0
 Clearing x we have:
 9x ^ 2 = 64
 Dividing between 9 we have:
 x ^ 2 = 64/9
 Taking square root we have:
 x = + / - 8/3
 
 The solutions are:
 x = 8/3
 x = -8 / 3

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for