Which graph shows a car traveling at 50 miles per hour?

Answer: The answer to your question would be the third graph to your left
Step-by-step explanation: because when you calculate the rate of change from these points:
(50,1)
(100,2)
(150,3)
(200,4)
The rate of change would be 50 miles/ km per hour
Finding the slope formula: [tex]m= y2-y1/ x2-x1[/tex]
And when you take any two points from the graph, for example: (50,1) and (200,4), it would look like this:
[tex]\frac{200-150}{4-1}= 50/1= 50 miles/km per hour[/tex]