Y = f(x) = -3x
y = -3x
y = (constant) x
y is proportional to x.<span>
Hence we can say Y is proportional to x , having (-3) as proportionality Constant. hope this helps</span>
Answer:

Step-by-step explanation:
b = 4 × 3.5 = 14 cm²
h = 2,1 cm
then



Answer:
x = 2
Step-by-step explanation:
-3 = -2x + 1
minus 1 to the both sides
-3 -1 = -2x
-4 = -2x
divide both sides by -2
x = 2
Answer:
30
Step-by-step explanation:
Answer:
Algebra
Step-by-step explanation: