112 is 80% of what number?

112 is 80% of 140.
80% can be written as 0.80 or 0.8.
how i got 140 is by finding the x value of this equation: 0.8x=112
to find the x, i divided 0.8 from both sides, 
0.8 divided by 0.8 cancel out.
112 divided by 0.8 is 140. 
therefore, 112 is 80% of 140

300b(x) is graphed by the functio