Question

What is the y-intercept of the function f(x) = -4.2^x​

Answer 1

Answer:

$(0,-1)$

Step-by-step explanation:

The y-intercept always occurs when $x=0$. To find the y-value of the y-intercept, substitute $x=0$ into your equation:

Given $f(x)=-4.2^x$, when $x=0$:

$f(x)=-4.2^0,\\f(x)=-(1)=-1$

• Recall that $n^0=1$ for $n\in \mathbb{R}$

Therefore, the y-intercept of this function is $(0, -1)$.