An integer is a whole number that can be positive, negative, or zero. For example ...-3,-2,-1,0,1,2,3....
Here, positive value indicates gain or above something where as negative value indicates loss or below something.
If the change in the value of his favorite card is $-7, that simply indicates that he is having a loss of $-7 that can be understand as the value of his this years card must be smaller than the last year card.
Theres 60 seconds in a minute. If it takes her 5 minutes, multiply 60 by 5. you will get 300. then all you will do is divide the meters by 300 seconds. you will get the answer of 1.5 metres per second.
