Which equation represents a proportional relationship? A. y = x + 1
B. y = 3x + 3
C. y = 4x
D. y = 8 + x

  C. y=4x

Step-by-step explanation:

Proportional relationship means that the line will be going through the origin, meaning that if the x coordinate is 0, then y has to also equal to 0. Also another way to determine a proportional relationship is by identifying the slope and y intercept. If the line has a y-intercept then it is not proportional because it will not be going through the origin.

y = 4x  Input 0  for x and y.

0 = 4(0)  

0 = 0  

This makes the statement true because if x is 0 then y is also 0.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

sadsdda

step-by-step explanation: