Question

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?

Answer 1

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.