Answer:
B. y=1/2x+7
Step-by-step explanation:
y2-y1/x2-x1 this finds the slope
Then take one of the coordinates: either (2,8) or (4,9) and plug them into x and y to find b (the y-int)
Perpendicular lines will have negative reciprocal slopes
B. y = -4x+ 5 and y = 1/4x + 4
D. y = x + 4 and y = -x + 4
E. y = -3 and x = -3
Answer:
D.

Step-by-step explanation:
The wildfire begins at a size of 8 square feet
It means that initial area =8
It then doubles its width every x hours,
and doubles its length every y hours
so, we can set up equation

now, we can simplify it

we are given
After a period of time, the wildfire covers 14,000 square feet
so, we can set A(x,y)=14000
we get


Parallel lines have the same slope but different y intercepts
Slope: 4
y=4x+b
this is the new equation, plug in the point
-10=4(-1)+B
-10=-4+B
add 4
-6=B
Y intercept= -6
slope; 4