What’s the rate of change of this graph?

1/1.

Step-by-step explanation:

The slope (rate of change) is 1x. (y = x + 4 is the slope-intercept formula).

The answer is 2

Step-by-step explanation:

Its  2 because 8/4 is 2

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2