(a) how would you characterize the relationship between the hours spent on homework and the test scores? explain.

Step-by-step explanation:

According to the graph, both variables are showing a positive linear correlation. We can deduct this by observing the trend of all points, they are raising, there we could apply a linear regression to find the average linear function that models this case.

However, we just can deduct that there's a positive correlation, to find further details we would need more data.

Remember that a positive linear correlation refers to the increasing behaviour of the dependent variable, while the independent variable also increases. That is, while one variable increases, the other also increases, that's called a positive correlation.

18a

step-by-step explanation:

simply because it is. it's the highest common factor

20

step-by-step explanation: