I just ate a lot of food and i'm about to fall into a food coma, I just need the answers. Luis is at a friend’s house that is several miles from his home. He starts walking at a constant rate in a straight line towards his home. The expression -4t + 16 gives the distance in miles that Luis is from his home after t hours. Answer the following questions:
▪ How many miles away from his home did Luis start?
▪ How fast is Luis traveling away from his friend’s house?
▪ Why is the rate negative?
▪ How far way from his house is Luis after 3 hours?

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.