Use the four functions below for this question:
f(x)
g(x)
h(x)
j(x)
graph of line going through (– 2, 2) and (– 1, – 1)
g(x) = 3x – 4
kelly had 4 apples in her kitchen on monday. on tuesday, only 1 was left.
x
j(x)
–2
–2
2
10
6
22
compare and contrast these four functions using complete sentences. focus on the slope and y-intercept first, and then on any additional properties of each function.

We will solve the system:
2 = - 2 m + b
-1 = - m + b / ·(-1 )

2 = - 2 m + b
+
1 = m - b

3 = -m,   m= -3,    2 = 6 + b,   b = -4,
f ( x ) = - 3 x - 4
For the linear function h (x)9 we have 3 apples less every day:
h ( x) = - 3 x + 4
- 2 = - 2 m + b
+
10 = 2 m + b

8 = 2 b,             b = 4,  m = 3
j ( x ) = 3 x + 4

Four linear functions are:
1 ) f ( x ) = - 3 x - 4 
Linear function has a slope: m = -3, y-intercept: y = -4, zero: x = -4/3 and this function is constantly decreasing.
2 ) g (x ) = 3 x - 4
Function has a slope: m = 3, y-intercept : y =-4, zero: x = 4/3 and it is constantly increasing.
3 ) h ( x ) = - 3 x + 4
Function has a slope: m = -3, y-intercept: y = 4, zero: x = 4/3 and it is constantly decreasing.
4 ) j (x) = 3 x + 4
Function has a slope m = 3, y-intercept : y = 4, zero: x = 4 and it is constantly increasing.
Two linear functions f ( x ) and h ( x ) are parallel ( have an equal slope ), and  also are g ( x ) and j ( x ).