David is rowing a boat upstream. the river is flowing at a speed of 2 miles per hour. david starts rowing at a speed of 6 miles per hour, but as he gets tired his speed decreases (at a rate of 1 mile per hour, every hour). which equation represents the speed of the boat for x hours spent rowing? y = x 4 y = x − 4 y = 4 − x y = 6 − x y = 6 − 2x

C) y =  4 - x

Step-by-step explanation:

Boat speed = 6m/h

River speed = 2m/h

Speed of the boat in upstream = 6m - 2m = 4miles per hour.

Rate of speed decrease = 1m/h

Here x represents the number of hours.

So the speed of the boat (y) = 4 - 1x

y = 4-x

Hope this will helpful.

Thank you.

answer

see attachment

explanation

the given function is

this function has y-intercept at

-4 and a slope of 2.

note that, the graph has a positive slope.

the graph that represents this function is the straight line that moves upward from left to right.

the graph touches the y-axis at -4.

the correct choice is the graph shown in the attachment.