What is the slope that passes through (4, 5) (9, 20)

slope = 3

Step-by-step explanation:

Calculate the slope m using the slope formula

m =

with (x₁, y₁ ) = (4, 5) and (x₂, y₂ ) = (9, 20)

m = = = 3

a. -0.3 > -0.33

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18