The total cost of renting a movie for different numbers of days is shown in the table.Which equation was used to create this table?

We will go through each row and try to establish the relationship between Number of days (d) and Total cost (c)
For Row 1:
d = 1,
c = 3.
There seems to be a difference of 2 between the two values.
Let us move over to the next row.
Row 2:
d = 2,
c = 4.
This pattern of difference of 2 continues. Let us try the next row.
Row 3:
d = 5,
c = 7.
Again, the pattern is repeated.
If we continue this way for the remaining 2 rows, we shall see that the pattern is repeated.
Therefore, a general rule for generating the table is:
"For any value of 'd', the value of 'c' is always 2 units higher"
Thus, in equation form:
Final Answer: c = 2 + d.