Edgar wants to plot the ordered pair (1.8, -1.2) on a coordinate plane. On each axis, one grid square equals 0.1. Starting at the origin, how can Edgar find (1.8, -1.2)?
Answer (3)
Starting on the x axis, Edgar has to move 18 squares to the right. Once he gets to the edge of the 18th square, he has to move down 12 squares.
How did I get these numbers? Let me tell you a story: If one unit on the graph is equal to 1, you got to divide the unit by 1. That's how many spaces you move. If one unit on the graph is equal to 2, you have to divide the coordinate by 2. And so on. For us, the unit is equal to 0.1. So we divide the 1.8 and -1.2 by 0.1, which gives us 18 and -12 respectively. We would move over by those numbers. Just make sure your little units are labeled in multiples of 0.1.
Edgar can plot the point (1.8, -1.2) on the grid by moving horizontally to the right 18 squares and then vertically downward 12 squares from the origin.
To plot the ordered pair (1.8,-1.2) on a coordinate plane where one grid square equals 0.1, Edgar needs to follow these steps:
Start at the origin (0,0), which is the center of the Cartesian coordinate system.
Since each grid square equals 0.1, Edgar needs to move horizontally to the right 18 squares to reach the x-coordinate of 1.8. This is because 1.8 divided by 0.1 equals 18.
Next, Edgar must move vertically downward 12 squares to reach the y-coordinate of -1.2. This is because -1.2 divided by 0.1 equals -12.
At this point, Edgar will have reached the location of the ordered pair (1.8, -1.2) on the Cartesian coordinate plane.
To plot the point (1.8, -1.2), Edgar should first move 18 squares right from the origin and then move 12 squares down. He will arrive at the point (1.8, -1.2) on the coordinate plane. This method uses the conversion of the coordinates based on the grid square size of 0.1.
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