It might help if you create a table....
When x is 0, y is 40
When x is 1, y is 40.25
When x is 2, y is 40.50
When x is 3, y is 40.75
When x is 4, y is 41
Draw the quadrant 1 of the graph since you don’t really need any negative number unless you want to show them then draw the hole thing.
The y scale should start at 40 so draw an equal sign going through the line showing you skip all the number between 0-39 to get to 40. And from there you could start going up by 1 or .25 however you want to scale it
The x scale should just go by one
Staring at the origin (0,0) go up to 40 on the y and make a dot than move to x is 1 and follow what I wrote above for like a table and you’ll see the trend
Feel free to leave a comment asking anymore questions you have about this