Answer:
(c) The x and y coordinates are switched
Step-by-step explanation:
Given

See attachment
Required
Determine the error in the plot
The plot on the attached graph is represented with: 
This implies that Raj plotted the x coordinate on the y coordinate and vice versa.
Hence: (c) is true
There's no way to know this without knowing the number of pencils he started with
Answer:
96-28 68
Step-by-step explanation:
Suppose the original price to be x.
62%x=296.4
Divide both sides by 62% to get x=478, which is the original price.