The unlabeled graph shows the relationship between two customary unit of measure. only two pairs of units can be represented by the graph

The possible pairs of units are (1,4) and (2,8). The second commodity units are 4 times of the first commodity units. The relation between all pairs is defined as .

Step-by-step explanation:

Let the first commodity units be x and second commodity units be  y.

From the given graph it is noticed that the line is passing through the points (1,4) and (2,8). Therefore the possible pairs of units are (1,4) and (2,8).

Slope of a line is:

Therefore the slope of the line is 4. If the second commodity units increased by 4 units if the first commodity units increased by 1 units.

Slope intercept form of a line is:

Where, m is slope and b is y-intercept.

The slope of the line is 4 and y-intercept is origin.

Therefore the possible pairs of units are (1,4) and (2,8). The second commodity units are 4 times of the first commodity units. The relation between all pairs is defined as .

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles