Let's check each value of y at x=11
y = 7x
substitute x=11
y = 7(11) = 77
y = x² - 13x + 96
substitute x=11
y= 11² - 13(11) + 96 = 121 -143 + 96 = 74
y = 1.11^x
substitute x = 11
y = 1.11^11 =3.15
Hence, the function with the greatest value at x = 11 is y=7x