y = 8 when x = -32, what is y when x = 64?
the value of y varies directly with x.
From the first values given, we know that y does
not equal x, but it does equal x plus some number.
y = x + b
8 = -32 + b
8 + 32 = b
40 = b
Our equation is y = x + 40
y = 64 + 40
y = 104
