Question

How to graph y<43-3x?

Answer 1

it's less than or equal to by the way.

Answer 2

Draw a line with a slope of -3 and start at the point (0,43).
Since it is less than, shade underneath the line like this:

And since it is also equal to, the line is a solid one. If it were not equal to, the line would be dashed, like this: