The amount of time t(in min) that takes to put out a fire varies inversely with g, the volume of water used (in hundreds of gallons).when g is 3,t is 15. find how long it takes to put out a fire when 500 gallons of water (g=5) are used
a.15 mins
b.9mins
c.25 mins
d.1min

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.