In this problem we have two vectors:
So we need to find two things:
and:
FIRST:
In this case we have the multiplication of vectors by scalars. A scalar is a simple number, so:
SECOND:
If we name:
Then, is the magnitude of the vector
. Therefore:
In the given graph, lets mark two points:
Let and
The slope of the line is given by:
The equation of the line is given by:
Therefore, the function equation represented by the graph is:
Answer:
Up
Step-by-step explanation:
Y= 1x^2 + 3x + 9
Y= Ax^2 + Bx + C
To determine which way a parabola opens just look at the coefficient (the number) of the x^2 - Always use the coefficient that is beside the x^2
So, if the coefficient A is positive the parabola is opening upward
if the coefficient A is negative the parabola is opening downward
