I want to creat a line graph.My range is 40-140 for my y-axis, I wanted to know can I plot my graph so I start with 40. Imagine this is my graph can I start with 40 and increase with incraments of 5: 0,40,45, 50...

If this is not correct then what is the the proper increments?

80
75 .
70
60 .
55
50 .
45 .
40
0-------------------------

draw a zig zab line on the y axis between the 0 and 40 and you can like so

\
/
\
/
\

except smaller of course and tighter and between the two numbers

Yes, you can definitely start your y-axis at 40 and increase with increments of 5. This is a valid choice for creating a line graph. In this case, your y-axis tick marks would be as follows: 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140.

Each tick mark represents a specific value on the y-axis. By incrementing the tick marks by 5, you are ensuring that there is an equal interval between each value on the y-axis.

However, it's important to note that the selection of the y-axis scale and tick mark increments can vary depending on the data being represented and the purpose of the graph. If the range of values in your data set is large or if the data points are very close together, you may need to adjust the scale and increments accordingly to effectively represent the data.