Answer:
Equation: y=7x
y=-28
Step-by-step explanation:
y=kx
y=98
x=14
98=14k
98/14=7
k=7
Equation: y=7x
x=-4
y=7•-4
y=-28
Part A
Chorus:
Expontential growth = b*a^x
b = 15
a = 1.12 (a= r+1), r = 12%
Which gives a function of f(x) = 15*1.12^x
Band
Linear growth = ax+b
a = 2
b = 30
Which gives a function of g(x)=2x+30
Part B:
f(9) = 15*1.12^9 = 41.59
g(9) = 2*9+30 = 48
Part C:
This is probably problem solving, where you're allowed to use calculators and other softwares.
Therefore you can use different softwares, and make f(x) = g(x).
I did this, and got it to 10.95427141
Answer:
I don't know how to do it the subject
