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zepelin [54]
3 years ago
9

Find the equation for the exponential function f (x) = b .aˣ that passes through the points (0,6) and (1,11).

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
5 0

Answer:

<h2>f(x)=6.(1,83)^{x}</h2>

Step-by-step explanation:

We have two points (0,6) and (1,11) and to find the exponential function that passes through that points we have to substitute them in the equation f(x)=b.a^{x}.

<h3><u><em>Observation:</em></u><em> f(x)=y then y=b.a^{x}</em></h3>

First we are going to replace the point (0,6) in the equation, where x=0 and y=6.

<h3><em>y=b.a^{x}\\ 6=b.a^{0}</em></h3>

<em>Remember: a^{0}=1</em>

<h3><em>6=b.a^{0} \\6=b</em></h3>

We got the value of b and it's 6. The equation now is:

<h3>y=6.a^{x}</h3>

Finally we have to replace the point (1,11),

<h3>y=6.a^{x} \\ 11=6.a^{1} \\ 11=6.a</h3>

<em>Remember: a^{1}=a</em>

Isolating the variable a:

<h3>11=6.a\\ \frac{11}{6} =a\\1,83=a</h3>

We have then, a=1.83 and b=6. Replacing a and b in f(x)=b.a^{x}

We obtain:

<h2>f(x)=6.(1,83)^{x}</h2>
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