找到你今天要练的题。

The function \( f \) is defined by \( f\left(x\right)=a^x+b \), where \( a \) and \( b \) are constants and \( a>0 \). In the xy-plane, the graph of \( y=f\left(x\right) \) has a y-intercept at \( \left(0,-20\right) \) and passes through the point \( \left(2,\ 43\right) \). What is the value of \( a−b \)?

The table shows selected values from the function \( f \).

The table shows selected values from the function .

\( y=3^{\left(x-1\right)}-6 \) 
For which of the following tables are all the values of x and their corresponding values of y solutions to the given equation?

\( g\left(x\right)=\frac{1}{9}\left(5\right)^x \) 
If the given function g is graphed in the xy-plane, where \( y=g\left(x\right) \), what is the y-intercept of the graph?

The function d is defined by \( d\left(x\right)=200-6^x \). What is the value of \( d\left(0\right) \)?

The function \( f \) is defined by \( f\left(x\right)=\left(-7\right)\left(4\right)^x+31 \). What is the y-intercept of the graph of \( y=f\left(x\right) \) in the xy-plane?

\( f\left(x\right)=8\left(7\right)^x \) 
The function f is defined by the given equation. If g(x)= f ( x + 2), which of the following equations defines the function g?

The graph of the equation \( y=2^x+k \) is shown, where k is a constant. What is the value of k?

What is the y-intercept of\( y=-\left(8\right)^x-38 \) in the xy-plane?

\( q\left(x\right)=21\left(3^x\right) \) 
Which table gives three values of x and their corresponding values of q(x ) for function q?

The exponential function f is defined by f(x) =k ⋅ 2^x , where k is a positive constant. If f (2) =25, what is the value of f (5) ?

For x > 0, the function f is defined as: f(x) equals three-fourths raised to the x^th power
Which of the following could describe the function?