You research the average cost of a tank of gasoline for a certain type of car for several recent years to look for trends. The t
able shows your data. What is the equation for a line of best fit? How much would you expect to pay for a tank of gas in the year 2019? Note: The table below shows the average cost for one tank of gasoline, not one gallon.
y = 1.006x + 26.40; $47.52
y = 1.006x + 26.40; $58.92
y = 26.40x + 1.006; $47.52
y = 26.40x + 1.006; $58.92
Because the initial value is $26.40, the line must pass through this when x is 0. Thus, the answer is either the first or the second equation. Next, we calculate the difference between the year 2019 and 1998 and substitute it into the value of x. 2019 - 1998 = 21. Substituting this into the equation: y = 1.006(21) + 26.40 y = $47.52
Tom is correct, and Dan is wrong. A quadrilateral is a closed figure with four sides, for example, like a kite. A parallelogram is a four sided rectangular figure with opposite sides that are parallel.