7) Ann uses the equation y = 8.25x to calculate the total cost y in dollars for x
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The coordinate -2, 4 implies -2 is the value on the x or horizontal axis and 4 is the value on the y or vertical axis.
<h3>What is a coordinate plane?</h3>This a plane used for graphs or points that is based on a vertical axis (y) and a horizontal axis (x).
<h3>How does -2,4 look on a coordinate plate?</h3>The first number, -2 indicates the value in x or the horizontal axis, while the second number 4 indicates the position on y or the vertical axis. You can see this in the imaged attached (red dot).
Learn more about plane in: brainly.com/question/24198263
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