Which statement about the graph is true? the graph shows a proportional relationship because it is a line, and the difference between each point is the same. the graph shows a proportional relationship because it is a line, and each x-value is a multiple of 2. the graph does not show a proportional relationship because each point written as a ratio gives a different value. the graph does not show a proportional relationship because a line that increases by 1 in the y-value cannot have a constant of proportionality.

The correct answer is: The graph does not show a proportional relationship because each point written as a ratio gives a different value.  

Graph can be defined as two-dimensional drawing which shows a relationship (usually between two set of numbers) usually by means of a line or curve.

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.