Answer:
y = -2x + 8
Step-by-step explanation:
f(2) = 4 is the same as (2, 4) where x = 2 and y = 4
f(3) = 2 is the same as (3, 2) where x = 3 and y = 2
m is the slope of the line
b is the y-intercept
y = mx + b
To find the slope,
m = (y2 - y1)/(x2 - x1) = (2 - 4)/(3 - 2) = (-2)/(1) = -2
m = -2
y = -2x + b
To solve for b, take one of the two given values.
Using (2, 4)
4 = -2(2) + b
4 = -4 + b
b = 8
Using (3,2)
2 = -2(3) + b
2 = -6 + b
To double check b = 8,
The y-intercept is when x = 0.
y = -2(0) + 8
y = 8
(0, 8)
you can subtract from point 1 to point 2
(9,-2) - (8,3)
9-8= 1
-2-3= -5
therefore horizontal leg is 1
vertical leg is -5
you can also sketch and count the units :)
Your answer should be 157.5 Inches
y= -1/2x+5 , y= -4x -2
im not very sure
in this set will be real numbers that are both less than 
and greater than 
. But that's not possible, so this set is empty.