A bicycle tire is pumped to a pressure of 120 psi (pounds per square inch). While riding his bike, Daniel ran over a small nail, and the tire has a small hole in it. Air is leaking and the tire is losing pressure at a rate of 12 psi per minute. If you graphed the pressure of the tire as the output, compared to the number of minutes as the input, which of the following statements about the graph would not be true?
A.

The graph would be a line.
B.

The graph would rise from left to right.
C.

The graph would be only in the first quadrant.
D.

The more time has passed, the lower the psi would be.

Question

A bicycle tire is pumped to a pressure of 120 psi (pounds per square inch). While riding his bike, Daniel ran over a small nail, and the tire has a small hole in it. Air is leaking and the tire is losing pressure at a rate of 12 psi per minute. If you graphed the pressure of the tire as the output, compared to the number of minutes as the input, which of the following statements about the graph would not be true?
A.
	
The graph would be a line.
B.
	
The graph would rise from left to right.     
C.
	
The graph would be only in the first quadrant.
D.
	
The more time has passed, the lower the psi would be.

anonymous · Answer

The graph would definitely be a line, this is because they tell you that the pressure is falling at a constant rate. The graph would be only in the first quadrant because time has to be positive, and pressure also has to be positive. Choice D doesn't look complete, but choice B is incorrect, since the pressure is falling, not rising

anonymous · Answer

Would it be c? @vinnv226

anonymous · Answer

No, choice C is true, because time has to be positive (x values must be positive) and pressure is always positive (y values must be positive) so the line will always be in quadrant 1