All you have to do is 21 ÷ 3 which is 7. If it was 2/3 then you would do the same thing but multiply 7 by 2 which is 14.
Answer:
(5,11)
(0,1)
(-2,-3)
Step-by-step explanation:
y=2(5)+1
y=10+1
y=11
so... (5,11)
y=2(0)+1
y=0+1
y=1
so... (0,1)
y=2(-2)+1
y=-4+1
y=-3
so... (-2,-3)
Equation 1:
y = -9x + b
-7 = -9(-2)+ b
-7 = 18+b
b = 11
y = -9x + 11
Equation 2:
y = -0.4x + 8
Hope this helps!