how would I graph a slope of 0.2 and a y intercept of 0.3?

I know that y intercept is up and down, and the slope is rise (up)over run (across) , but I am confused because of the decimal format. Thank you, I asked mom but she doesn't know either, and I couldn't find examples in the book.

The slope-intercept form is called that for a reason:

y = 0.2x + 0.3

decimals are just numbers, like any others.