Topic Test Answers

xy-5207The table of ordered pairs shows the coordinates of the two points on the graph of a line. Which equation describes the line?a.y = x + 7c.y = -5x +2b.y = x - 7d.y = 5x + 2

You have decided to buy a new car, but you are concerned about the value of the car depreciating over time. You do some research on the model you are looking at and obtain the following information: Suggested retail price - $18,790 Depreciation per year - $1385 (It is assumed that this value is constant.) The following table represents the value of the car after n years of ownership. n, years V, value in dollars 0 18,790 1 17,405 2 16,020 3 14,635 5 11,865 8 7710 Determine the n-intercept of the graph of the car value equation . a. or 14 b. c. d. Please select the best answer from the choices provided

Have vehicles gotten more fuel-efficient over the years? Between 1960 and 1999 the size and shape of automobiles in the United States has changed almost annually. The amount of fuel consumed by these vehicles has also changed. The following table describes the average fuel consumption per year per passenger car in gallons of gasoline.Year, t19601970198019901995199719981999Gallons Consumed Per Passenger Car668760576520530538544552Determine the average rate of change, in gallons of gas per year, from 1960 and 1999 and then determine what the result means in this situation.a. -0.33gal/year; the average fuel consumption per year of a passenger car in the U.S. decreased by a third of a gallon per year.b.0.33 gal/year; the average fuel consumption per year of a passenger car in the U.S. increased by a third of a gallon per year.c.2.97 gal/year; the average fuel consumption per year of a passenger car in the U.S. increased by nearly 3 gal/year.d.-2.97 gal/year; the average fuel consumption per year of a passenger car in the U.S. decreased by nearly 3 gal/year.