A. 320 km in 5 hours is a rate of per hour. b. 48 books bought for $360 is at the rate of per book.
c. If 900 litres of water flows through a tap in 2 hours, it is the rate of per minute.
d. Richard works for 10 hours and is paid $145. His rate of pay is per hour.
e. 5kg of peas cost $12.58, which equals per kg.

a. 64

b. 7.5

c. 7 min 5 sec

d. 14.5

e. 2.52

false

step-by-step explanation:

whenever we assume a point on a plane then according to geometry it will definitely have 2 dimensions and if it assumed in space then it will have 3 dimensions.

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.