Question 42725
You wish to graph
C = 10x + 40
Notice that if x = 0, then C = 40
That's your first point...(0, 40)
Now what if x = 1?
Well, then C = 50
That's your next point...(1, 50)
x = 2? C = ?
x = 3? C = ?
Connect them and you're done...