// Numbas version: finer_feedback_settings
{"name": "Distance-Time Graphs", "extensions": [], "custom_part_types": [], "resources": [["question-resources/Distance-time_graph.png", "/srv/numbas/media/question-resources/Distance-time_graph.png"], ["question-resources/Distance-time_graph2.png", "/srv/numbas/media/question-resources/Distance-time_graph2.png"]], "navigation": {"allowregen": true, "showfrontpage": false, "preventleave": false, "typeendtoleave": false}, "question_groups": [{"pickingStrategy": "all-ordered", "questions": [{"extensions": [], "statement": "<p>The distance-time graph below shows a journey.</p>\n<p>{image('resources/question-resources/Distance-time_graph2.png')}</p>\n<p>A = $\\var{A}$</p>\n<p>B = $\\var{B}$</p>\n<p>C = $\\var{C}$</p>", "ungrouped_variables": ["A", "B", "C", "D", "WX", "stat", "YZ", "YZ2"], "parts": [{"showFeedbackIcon": true, "minMarks": 0, "displayType": "radiogroup", "matrix": [0, "1", 0], "distractors": ["", "", ""], "variableReplacementStrategy": "originalfirst", "scripts": {}, "marks": 0, "shuffleChoices": true, "choices": ["<p>W-X</p>", "<p>X-Y</p>", "<p>Y-Z</p>"], "variableReplacements": [], "prompt": "<p>Which part of the graph shows the traveller standing still?</p>", "type": "1_n_2", "maxMarks": "1", "displayColumns": "1", "showCorrectAnswer": true}, {"showFeedbackIcon": true, "correctAnswerStyle": "plain", "correctAnswerFraction": false, "allowFractions": false, "variableReplacementStrategy": "originalfirst", "notationStyles": ["plain", "en", "si-en"], "marks": 1, "minValue": "stat", "variableReplacements": [], "prompt": "<p>For how many hours is the traveller stationary?</p>", "type": "numberentry", "scripts": {}, "maxValue": "stat", "showCorrectAnswer": true}, {"showFeedbackIcon": true, "correctAnswerStyle": "plain", "correctAnswerFraction": false, "allowFractions": false, "variableReplacementStrategy": "originalfirst", "notationStyles": ["plain", "en", "si-en"], "marks": 1, "minValue": "WX-0.05", "variableReplacements": [], "prompt": "<p>What is the traveller's speed between W and X? Give your answer to 2 decimal places.</p>", "type": "numberentry", "scripts": {}, "maxValue": "WX+0.05", "showCorrectAnswer": true}, {"showFeedbackIcon": true, "correctAnswerStyle": "plain", "correctAnswerFraction": false, "allowFractions": false, "variableReplacementStrategy": "originalfirst", "notationStyles": ["plain", "en", "si-en"], "marks": 1, "minValue": "D-0.1", "variableReplacements": [], "prompt": "<p>If the traveller's speed between Y and Z is $\\var{YZ2}$, what is D? Give your answer to&nbsp;the nearest integer (whole number).</p>", "type": "numberentry", "scripts": {}, "maxValue": "D+0.1", "showCorrectAnswer": true}], "tags": [], "rulesets": {}, "advice": "<p>Horizontal lines on distance-time graphs are when the subject is stationary. Lines with a positive gradient are heading away from the starting point, and lines with a negative gradient are heading towards the starting point.</p>\n<p>You calculate the speed of a section of a distance-time graph by finding the gradient of that section. Remember gradient = difference in y / difference in x. This is the same as saying speed = distance / time.</p>\n<p>You can work out missing values by rearranging the speed = distance / time equation.</p>", "variables": {"stat": {"templateType": "anything", "group": "Ungrouped variables", "name": "stat", "definition": "C-B", "description": ""}, "YZ": {"templateType": "anything", "group": "Ungrouped variables", "name": "YZ", "definition": "A/(D-C)", "description": ""}, "D": {"templateType": "anything", "group": "Ungrouped variables", "name": "D", "definition": "random(51..60)", "description": ""}, "C": {"templateType": "anything", "group": "Ungrouped variables", "name": "C", "definition": "random(21..50)", "description": ""}, "WX": {"templateType": "anything", "group": "Ungrouped variables", "name": "WX", "definition": "A/B", "description": ""}, "YZ2": {"templateType": "anything", "group": "Ungrouped variables", "name": "YZ2", "definition": "precround(YZ, 2)", "description": ""}, "A": {"templateType": "anything", "group": "Ungrouped variables", "name": "A", "definition": "random(10..30)", "description": ""}, "B": {"templateType": "anything", "group": "Ungrouped variables", "name": "B", "definition": "random(1..20)", "description": ""}}, "metadata": {"licence": "Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International", "description": "<p>Questions about distance-time graphs</p>"}, "variable_groups": [], "variablesTest": {"condition": "", "maxRuns": 100}, "preamble": {"js": "", "css": ""}, "name": "Distance-Time Graphs", "functions": {}, "type": "question", "contributors": [{"name": "Rachel Staddon", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/901/"}]}]}], "contributors": [{"name": "Rachel Staddon", "profile_url": "https://numbas.mathcentre.ac.uk/accounts/profile/901/"}]}