Applications (HSC SSCE Mathematics Advanced): Quizzes

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In the exponential function y=k(ax)y = k(a^x), what does kk represent?

The initial amount when x=0x = 0

What condition on the base aa indicates exponential growth in y=k(ax)y = k(a^x)?

a>1a > 1

What is the horizontal asymptote for exponential functions of the form y=k(ax)y = k(a^x)?

y=0y = 0

For A=5000(1.03t)A = 5000(1.03^t), what is the y-intercept?

5000

Which scenario is commonly modelled by exponential functions?

Compound interest

For y=k(ax)y = k(a^x) where a>1a > 1, what is the end behaviour as x→∞x \to \infty?

y→∞y \to \infty

For N=200(3t)N = 200(3^t), what is NN when t=0t = 0?

200

In bacterial growth N=200(3t)N = 200(3^t), why is the domain restricted to t≥0t \geq 0?

Time cannot be negative in context

What special property does y=exy = e^x have?

It is its own derivative

If y=k(ax)y = k(a^x) has a=0.8a = 0.8, what type of model is this?

Exponential decay

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