Mathematical Literacy QUESTION 3 3.1 7 Capricorn South/Gr.11 Test No.1 2024 NSC Jane and his sister are baking dough nuts and sell them to school children next to their home. It costs the R4,80 to make one dough nut. It cost them R240 for electricity and transport to buy the ingredients. They sell one dough nut at R7.00. TABLE 1: INCOME AND COST FOR JANE'S DOUGH NUTS No. of dough nuts 0 5 10 30 A 80 120 150 200 Cost in Rand(s) 240 264 288 384 600 624 816 B 1 200 Income in Rand(s) 0 35 70 210 525 560 C 1 050 1 400 **************** 3.1.1 Use the information above to answer the questions that follow. Determine which variable is dependent and which one is independent. (2) 3.1.2 Calculate the values of A, B and C. (6) 3.1.3 Income graph for Jane's business has been drawn on the answer sheet provided. Draw the cost graph on the same answer sheet (Answer sheet 1). (4) 3.1.4 If Jane and the sister decide to increase the selling price of one dough nut to R7, 50, what will happen to the point of intersection of these graphs? (2) 3.1.5 The Income amount in rand(s) is always starts at 0. Give a reason why? (2)
