Papaju, this is the solution:
Let's recall the formula of the rate of change:
Rate of change = Change in y/ Change in x
In consequence,
Rate of change = 7/1
Rate of change = 7
Where the function equation is:
y = 7x
This can be represented in the following table
x y
_____________
1 7
2 14
3 21
4 28
5 35