First, take two points from the graph. Call these points (a, b) and (c, d).
Next, find the slope. You can find this by doing (b-d)/(a-c).
Call the slope m. You will need this later.
Make an equation in slope intercept form (y = mx + b).
Now, take one of the points, and plug it into the equation.
mx + b has the same m as the slope.
From here, you can figure out b (the y-intercept).
To make a system, you do the same thing, but find where it is greater and lower.
The answer for this problem: Option C.
Answer:
The slope is 1.181818182 or just round to 1.18.
Step-by-step explanation:
F'(x, y) = 14x +xydy/dx + 14ydy/dx = 0
(xy+14y)|dy/dx = -14x
dy/dx = -14x /(xy+14y)
dy/dx |(x=1,y=1) : -14(1) / (1+14) = -14/15
using
y-y1=/x-x1 = -14/15
y-1/x-1 = -14/15
15y-15 = -14x+14
15y+14x -15-14=0
14x +15y = 29
So he worked 30.5 hours, he just didn't write some of the hours down. To find the hours he didn't write down, you subtract 8+
+
from 30.5, which equals
