// Numbas version: exam_results_page_options {"name": "Identifying points on a graph", "extensions": ["jsxgraph"], "custom_part_types": [], "resources": [], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"name": "Identifying points on a graph", "statement": "", "advice": "

The correct answers are obtained as follows.

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The point \$A\$ is distance \$\\var{a}\$ from the origin in the horizontal direction (positive is to the right and negative is to the left), so its \$x\$-coordinate is \$\\var{a}\$.

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The point \$A\$ is distance \$\\var{b}\$ from the origin in the vertical direction (positive is upwards and negative is downwards), so its \$y\$-coordinate is \$\\var{b}\$.

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The point \$B\$ is distance \$\\var{c}\$ from the origin in the horizontal direction (positive is to the right and negative is to the left), so its \$x\$-coordinate is \$\\var{c}\$.

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The point \$B\$ is distance \$\\var{d}\$ from the origin in the vertical direction (positive is upwards and negative is downwards), so its \$y\$-coordinate is \$\\var{d}\$.

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The point \$C\$ is distance \$\\var{ee}\$ from the origin in the horizontal direction (positive is to the right and negative is to the left), so its \$x\$-coordinate is \$\\var{ee}\$.

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The point \$C\$ is distance \$\\var{f}\$ from the origin in the vertical direction (positive is upwards and negative is downwards), so its \$y\$-coordinate is \$\\var{f}\$.

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The point \$D\$ is distance \$\\var{g}\$ from the origin in the horizontal direction (positive is to the right and negative is to the left), so its \$x\$-coordinate is \$\\var{g}\$.

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The point \$D\$ is distance \$\\var{h}\$ from the origin in the vertical direction (positive is upwards and negative is downwards), so its \$y\$-coordinate is \$\\var{h}\$.

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", "parts": [{"showCorrectAnswer": true, "variableReplacementStrategy": "originalfirst", "extendBaseMarkingAlgorithm": true, "showFeedbackIcon": true, "scripts": {}, "variableReplacements": [], "customMarkingAlgorithm": "", "prompt": "

What are the coordinates of the points \$A\$-\$D\$ on the following graph?

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Note that all coordinates are whole numbers.

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{dragpoint()}

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The \$x\$-coordinate of \$A\$ is [[0]].

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The \$y\$-coordinate of \$A\$ is [[1]].

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The \$x\$-coordinate of \$B\$ is [[2]].

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The \$y\$-coordinate of \$B\$ is [[3]].

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The \$x\$-coordinate of \$C\$ is [[4]].

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The \$y\$-coordinate of \$C\$ is [[5]].

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The \$x\$-coordinate of \$D\$ is [[6]].

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The \$y\$-coordinate of \$D\$ is [[7]].

This is the y-coordinate of the third point.

", "group": "Ungrouped variables", "templateType": "anything"}, "a": {"definition": "random(-10..10)", "name": "a", "description": "

This is the x-coordinate of the first point.

", "group": "Ungrouped variables", "templateType": "anything"}, "h": {"definition": "random(-10..10)", "name": "h", "description": "

This is the y-coordinate of the fourth point.

", "group": "Ungrouped variables", "templateType": "anything"}, "g": {"definition": "random(-10..10)", "name": "g", "description": "

This is the x-coordinate of the fourth point.

", "group": "Ungrouped variables", "templateType": "anything"}, "ee": {"definition": "random(-10..10)", "name": "ee", "description": "

This is the x-coordinate of the third point.

", "group": "Ungrouped variables", "templateType": "anything"}, "b": {"definition": "random(-10..10)", "name": "b", "description": "

This is the y-coordinate of the first point.

", "group": "Ungrouped variables", "templateType": "anything"}, "d": {"definition": "random(-10..10)", "name": "d", "description": "

This is the y-coordinate of the second point.

", "group": "Ungrouped variables", "templateType": "anything"}, "c": {"definition": "random(-10..10)", "name": "c", "description": "

This is the x-coordinate of the second point.

", "group": "Ungrouped variables", "templateType": "anything"}}, "preamble": {"js": "", "css": ""}, "rulesets": {}, "metadata": {"description": "

This question allows you to practice identifying points on graphs.

", "licence": "Creative Commons Attribution 4.0 International"}, "functions": {"dragpoint": {"definition": "// set up the board\nvar div = Numbas.extensions.jsxgraph.makeBoard('500px','500px',{boundingBox:[-11,11,11,-11],grid:true,withLabel:true});\n\nvar board = div.board;\n\nvar x1 = Numbas.jme.unwrapValue(scope.variables.a);\nvar y1 = Numbas.jme.unwrapValue(scope.variables.b);\nvar x2 = Numbas.jme.unwrapValue(scope.variables.c);\nvar y2 = Numbas.jme.unwrapValue(scope.variables.d);\nvar x3 = Numbas.jme.unwrapValue(scope.variables.ee);\nvar y3 = Numbas.jme.unwrapValue(scope.variables.f);\nvar x4 = Numbas.jme.unwrapValue(scope.variables.g);\nvar y4 = Numbas.jme.unwrapValue(scope.variables.h);\n\nvar e = board.create('point',[10,0],{size:-1,name:'x'});\ne.setProperty({fixed:true});\nvar f = board.create('point',[0,10],{size:-1,name:'y'});\nf.setProperty({fixed:true});\n\nvar a = board.create('point',[x1,y1],{size:5});\na.setProperty({fixed:true});\nvar b = board.create('point',[x2,y2],{size:5});\nb.setProperty({fixed:true});\nvar c = board.create('point',[x3,y3],{size:5});\nc.setProperty({fixed:true});\nvar d = board.create('point',[x4,y4],{size:5});\nd.setProperty({fixed:true});\n\nreturn div;", "parameters": [], "language": "javascript", "type": "html"}}, "tags": [], "variable_groups": [], "type": "question", "contributors": [{"name": "Anthony Brown", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/799/"}]}]}], "contributors": [{"name": "Anthony Brown", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/799/"}]}