The product of something is multiplication and when multiplying fractions you multiply the numerator and denominator. In this case the correct answer is A as 3/4 x 7/8 = 21/32 and when comparing this to the fraction 7/8 you must make the denominator (8), equal to 32. In order to do this you must multiply 8x4 as it equal 32 and then multiply 7 by 4 as whatever you do to the bottom you do to the top. So the final comparison would be 21/32 is less than 28/32, which is true.
Look at the graph. You want to see how much distance he is at 9 minutes. Go all the way to 9 minutes, then go up. What coordinate does it fall in? (9,80). He travelled 80 meters in 9 minutes. (D)
