PRETTY PLEASE HELP!! A mathematics software company claimed that their software could increase student performance in Algebra 2 by 30 points. In a random sample of 25 students who used the software, the average was 21 points, and had a standard deviation of 12 points. What is the z-value? Do we accept or reject the claim based on the z-value? Explain. *
Your answer

It will be a whole number.

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.