A railroad crew can lay 7 miles of track each day. They need to lay 203 miles of track. The length, L (in miles), that is left t
o lay after d days is given by the following function. L(d) = 203 - 7d (How many days will it take the crew to lay all the track?) (How many miles of track does the crew have left to lay after 18 days?)
Students should be able to find the x-intercepts of a quadratic function using both factoring and completing the square. All that should be given to students is the standard form of a quadratic equation in the form y = ax^2 + bx + c.
