The 1970s saw a number of new models added to the Buick lineup including the Estate Wagon as its own model in 1970, Buick Centurion in 1971, Buick Apollo in 1973, and Buick Skyhawk in 1975.  1975 also saw the first appearance of the "Buick Park Avenue" nameplate for Buick as a trim/option package on the Electra 225 Limited.  A Buick Century paced the Indianapolis 500 race not once but twice in the mid 1970s.  For 1976, Buick began selling rebadged Isuzu Geminis as Opels to replace the Opel Kadett models it had previously marketed.  The following year, Electra 225 and LeSabre were redesigned and downsized and the Buick brand saw its best model year sales to date with 773,313 vehicles sold.  1978 marked Buicks 75th anniversary and welcomed a redesigned Century as well as a redesigned Regal coupe which was now available with a turbocharged Buick V6 engine engine.  Buick model year sales broke another record in 1978 with 795,316 vehicles sold.  For 1979, the Riviera was redesigned; Riviera S-Type was named Motor Trend Car of the Year.

Question: How many new models were released between 1970 and 1975?
Answer: 4

Question: How many vehicles were sold in 1977?
Answer: 773313

Question: How many more vehicles were sold in 1978 than in 1977?
Answer: 22003

Question: Which models were released between 1970 and 1975?
Answer: Estate Wagon, Buick Centurion, Buick Apollo, Buick Skyhawk

Question: What car brand is the Estate Wagon?
Answer: Buick

Question: What buick model was made first: Estate Wagon or Buick Centurion?
Answer: Estate Wagon

Question: What buick model was made last: Estate Wagon or Buick Centurion?
Answer: Buick Centurion

Question: What buick model was made first: Buick Apollo or Buick Skyhawk?
Answer: Buick Apollo

Question: What buick model was made last: Buick Apollo or Buick Skyhawk?
Answer: Buick Skyhawk

Question: What buick model was made first: Buick Centurion or Buick Apollo?
Answer: Buick Centurion

Question: What buick model was made last: Buick Centurion or Buick Apollo?
Answer: Buick Apollo

Question: Which Buick was created first, Buick Apollo or the Estate Wagon?
Answer: the Estate Wagon

Question: How many years apart is the creation of the Skyhawk from the Buick Apollo?
Answer: 2

Question: How many years after the Buick Centurion was introduced was the Buick Apollo introduced?
Answer: 2

Question: How many years apart are the Estate Wagon and the Buick Skyhawk?
Answer: 5

Question: When was the Electra 225 and LeSabre  redesigned and downsized?

Question: How many years did the Buick lineup see a redesign?
Answer: 3

Question: How many Buick models were added during the 1970s?
Answer: 4

Question: Which model was added last, Buick Apollo or Buick Centurion?
Answer: Buick Apollo in 1973

Question: How many years after the Buick Apollo was added was the Buick Skyhawk added?
Answer: 2

Question: Which Buick was the second model added in the 1970s?
Answer: Buick Centurion

Question: What models did Buick add in the 1970s?
Answer: Estate Wagon, Centurion, Apollo, Skyhawk

Question: Which model was introduced first, the Apollo or the Skyhawk?
Answer: Apollo

Question: How many models were redesigned in 1978?
Answer: 2

Question: Which Buick models were redesigned for the company's 75th anniversary?
Answer: Century, Regal

Question: How many more cars did Buick sell in 1978 than in 1977?
Answer: 22003

Question: How many years after the introduction of the Apollo was the Century redesigned?
Answer: 5