Question

the table shows the shipping costs for items of different values. which best describes the strength of the model? shipping costs for items a weak positive correlation a strong positive correlation a weak negative correlation a strong negative correlation

Explanation:

Step1: Analyze the relationship between variables

As the total cost of items ($x$ - values: $25,45,50,70$) increases, the shipping costs ($y$ - values: $6.99,8.99,8.99,10.99$) also tend to increase. So it is a positive correlation.

Step2: Check the strength

The increase is not very steep. For example, from $x = 25$ to $x=45$ (an increase of $20$ in $x$), $y$ increases by $2$ (from $6.99$ to $8.99$). From $x = 45$ to $x = 50$ (an increase of $5$ in $x$), $y$ remains the same. From $x=50$ to $x = 70$ (an increase of $20$ in $x$), $y$ increases by $2$ (from $8.99$ to $10.99$). The points do not lie very close to a straight - line, so it is a weak correlation.

Answer:

a weak positive correlation