Interactive practice questions
Consider the following.
Which of the following is the graph of a linear relationship?
What makes that graph linear, but not the other two?
In a linear relationship, the $y$y value is always increasing.
In a linear relationship, the $y$y value changes at a constant rate.
In a linear relationship, the $y$y value changes at a faster and faster rate.
Consider the values in each table. Which of them could represent a directly proportional relationship between $x$x and $y$y?
The diagram shows the graph of a straight line with positive gradient.
Which of the following statements are true of this graph? Select all the correct options.
A straight line graph has a positive $y$y-intercept and a positive $x$x-intercept. Which of the following must also be true of the straight line graph?