Answer:
No
Step-by-step explanation:
No, because Yellow has 2 outputs and a function requires only one output (y) per input (x)
21.5 is because it’s counting the same from 0 and 21.5 is the highest number
ANSWER

EXPLANATION
The required equation passes through:
(4,3) and is perpendicular to x+y=4.
Rewrite the given equation in slope-intercept form:

The slope of this line is -1.
The slope of the required line is perpendicular to this line, so we find the negative reciprocal of this slope.

The equation of the line can be found using:

We substitute the slope and point to obtain:

We simplify to get:


The required equation is