Asmall school employs 5 teachers who make between $40,000$70,000 per year. the newest teacher, valerie, decides to teach part-time which decreases her salary from $40,000$20,000 per year. the rest of the salaries stay the same. how will decreasing valerie's salary affect the mean and median?

40-24 to 4: 740+24=class4=boys 7=gals =4: 7

First locate the turning point (vertex) of the graph. which is at the coordinates x=5 and y=9 or (5; 9).to determine whether it's a maximum or mininum value, you have to discern whether the vertex's y-value is the highest value or lowest value the graph can reach. since the vertex's y-value, 9 is the highest value the graph can reach, it will be a maximum.another basic way to determine whether the vertex's value is max or min is to see if the graph is smiling or sad. if it's smiling, the turning point/vertex would be a minimum, while a sad parabola would have a maximum y-value at the vertex.