Just flip the signs of co-ordinates by using formula y=>-y
- Make sure to do this with y only as it has been reflected to y axis



When using serious words, you could make a joke in the notice to lighten up the topic
Answer:
4 hours
Step-by-step explanation:
Write an equation
19 +1.5x < 15+2.75x
Subtarct 15 on both sides
4+1.5x<2.75x
subtract 1.5x on both sides
4< 1.25x
Divide 1.25 on each side
3.2<X
Since they on,y charge per hour so 4 hours