0 2 x –4 –2 1 y –8 –5 –2 Interpreting a Scatter Plot EXAMPLE 2: DVD Player: The table shows how the cost of a DVD player has changed. Number of months on shelf 0 3 6 9 12 15 x Price $215 $210 $199 $184 $167 $140 y Make a scatter plot of the data. Tell whether and have a a or x y positive relationship, negative relationship, no relationship. Estimate the price of the DVD player after 18 months on the shelf. Solution In the scatter plot, the as the increase. y-coordinates x-coordinates ANSWER The quantities have a relationship. To estimate the price of the DVD player after 18 months, draw a curve that shows the overall pattern of the data. The curve looks like it will pass through the point (18, ). ANSWER The price of the DVD player after 18 months on the shelf is about
x –4 –2 0 2 y –8 –5 –2 1 EXAMPLE 2: Interpreting a Scatter Plot DVD Player: The table shows how the cost of a DVD player has changed. Number of months on shelf x 0 3 6 9 12 15 Price y $215 $210 $199 $184 $167 $140 Make a scatter plot of the data. Tell whether x and y have a positive relationship, a negative relationship, or no relationship. Estimate the price of the DVD player after 18 months on the shelf. Solution In the scatter plot, the y-coordinates as the x-coordinates increase. ANSWER The quantities have a relationship. To estimate the price of the DVD player after 18 months, draw a curve that shows the overall pattern of the data. The curve looks like it will pass through the point (18, ). ANSWER The price of the DVD player after 18 months on the shelf is about
Grade_5GT_Math_Armour_for_All_LS_4.docx