Question 1
In a scatterplot of two numerical variables, the variable plotted on the horizontal axis that is used to predict the other is called the:
Correct Answer:
Explanatory variable
Question 2
A scatterplot shows points that fall close to a straight line that slopes downwards from left to right. The correlation is best described as:
Correct Answer:
Strong negative
Question 3
Pearson's correlation coefficient r for a data set is -0.92. This indicates a:
Correct Answer:
Strong negative linear association
Question 4
The least-squares regression line for predicting weekly sales (y, in $1000s) from advertising spend (x, in $1000s) is y = 3.2 + 1.5x. What does the gradient 1.5 mean in context?
Correct Answer:
Each extra $1000 of advertising is associated with $1500 more sales
Question 5
Using the regression line y = 3.2 + 1.5x (sales in $1000s, advertising in $1000s), the predicted sales when advertising spend is $6000 is:
Correct Answer:
$$12 200
Question 1
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Prepare with the WACE Maths Applications Practice Questions - WACE ATAR Mathematics Applications (Units 3 & 4) Exam practice quiz. This question bank includes 100 questions covering graph, line, value, data, and sales. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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WACE Maths Applications Practice Questions - WACE ATAR Mathematics Applications (Units 3 & 4) Exam

This practice set contains 100 questions from the matching question bank and focuses on graph, line, value, data, and sales. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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