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### MEAP Preparation - Grade 7 Mathematics2.16 Direct Variation or Direct Proportion Directions: Answer the following questions. Also write at least ten examples of your own.
 Q 1: The numbers p and q are directly proportional and p=7.5 when q=15. Find p when q=38; and find q when p=13.19 and 26 respectively26 and 19 respectively15 and 29 respectively Q 2: The numbers x and y are directly proportional and x=9 when y=3. Find x when y=8; and find y when x=42.25 and 15 respectively14 and 24 respectively24 and 14 respectively Q 3: The numbers r and s vary directly and the constant of variation is 3/5. Find r if s=45; and find s if r =33.50 and 25 respectively27 and 55 respectively55 and 27 respectively Q 4: The weight E of a man on earth's surface is directly proportional to his weight M on mars. The constant of proportionality is 3, if a man weights 126 kg on earth, how much will he weigh on mars?40 kgs42 kgs45 kgs Q 5: A family spends 120 dollars per month for vegetables when the cost of vegetables is 5 dollars per kg. How much amount must the family spend per month, if the cost of vegetables goes up to 5.75 dollars per kg?140 dollars130 dollars138 dollars Q 6: One evening the length of the shadow of a building's pillar of height 28 m is 42 m. What will be the length of the shadow of the building's tower of height 36 m at that time?50 m45 m54 m Q 7: The amount of heat (H) produced in human body by burning of proteins is directly proportional to the amount of proteins (A) burnt. If burning of 1 gram of proteins produces 32 calories of heat, how much proteins should be burnt to produce 52 calories?13 grams20 grams15 grams Q 8: The expenditure per month for 15 students in a dormitory is \$2,250. If 10 more students joined, what will be the monthly expenditure now?\$3,750\$2,750\$3,500 Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!