Train a traveled 173 miles in five hours. for train b, y = 31.35x represents its rate of speed over the same five hours. which train traveled at a faster rate and by what factor? (round to nearest tenth)
a) train b by a factor of 3.2 *my answer
b) train a by a factor of 3.2
c) train b by a factor of 1.1
d) train a by a factor of 1.1 *the correct answer?
can someone explain how d is the correct answer, because i'm really confused : /

Wait what the question

Wish i could u but i just don’t know the answer

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.