an equation of a trend line for the scatter plot is y = 42x + 50. predict how many more sales the store…
an equation of a trend line for the scatter plot is y = 42x + 50. predict how many more sales the store makes in december than in november. enter the number in the box.
Answer
Answer:
42
Explanation:
Step1: Identify x - values for months
November: $x = 11$, December: $x = 12$.
Step2: Calculate sales for November
Substitute $x = 11$ into $y = 42x+50$, $y_{11}=42\times11 + 50=462+50 = 512$.
Step3: Calculate sales for December
Substitute $x = 12$ into $y = 42x+50$, $y_{12}=42\times12+50 = 504+50=554$.
Step4: Find the difference
$y_{12}-y_{11}=(42\times12 + 50)-(42\times11+50)=42\times(12 - 11)=42$.