2 1.6.2 Test (CST): Rate, Ratio, and Proportion Do these pairs of values (x and y) represent two quantities that are
proportional?
ху
15
2 10
3 15
5 25
O A. Yes, because as x increases, y increases
OB. No, because only one of the pairs is a simplified ratio.
O C. No, because y is not increasing at a constant rate.
OD. Yes, because all of the pairs represent the same ratio.

all it means is function 3

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.