f(x) = 55x + 0
Ignore the 0 because that's just to show that it
is in the form f(x) = y = mx+b, slope-intercept
form for the equation of a line. So only look at
f(x) = 55x
You know that
distance = rate × time
f(x) is the distance in miles,
55 is the rate in miles per hour,
and
x is the time in hours.
So since distance = rate × time,
f(x) = 55x
552 = 55x
Substitute 552 for the f(x), the number of miles.
Then solve for x, the time in hours, by
dividing both sides by 55
552/55 = x
So x =
hours
Edwin