# Can an exponential graph cross the x-axis?

## Can an exponential graph cross the x-axis?

In an exponential graph, the “rate of change” increases (or decreases) across the graph. graph is asymptotic to the x-axis – gets very, very close to the x-axis but, in this case, does not touch it or cross it.

## What causes an exponential graph to be reflected over the x-axis?

In addition to shifting, compressing, and stretching a graph, we can also reflect it about the x-axis or the y-axis. When we multiply the parent function f(x)=bx f ( x ) = b x by –1, we get a reflection about the x-axis. When we multiply the input by –1, we get a reflection about the y-axis.

Do exponential graphs have X intercepts?

They’ll never hit zero, so this function has no x-intercepts, but they get very, very close. So close that when we try to draw the graph, it’ll look like the function is hitting the x-axis. Any exponential function will also have an asymptote—a value that the function gets really close to, but never quite hits.

Why do exponential functions never touch the X-axis?

Properties of Exponential Graphs The function y=bx y = b x has the x -axis as a horizontal asymptote because the curve will always approach the x -axis as x approaches either positive or negative infinity, but will never cross the axis as it will never be equal to zero.

### What type of graph is 1 x?

hyperbola
The parent function of a rational function is f(x)=1x and the graph is a hyperbola . The domain and range is the set of all real numbers except 0 . In a rational function, an excluded value is any x -value that makes the function value y undefined.

### What is an exponential graph?

At the most basic level, an exponential function is a function in which the variable appears in the exponent. The most basic exponential function is a function of the form y=bx y = b x where b is a positive number. When b>1 the function grows in a manner that is proportional to its original value.

How can you tell if a graph is exponential?

Graphs of Exponential Functions

1. The graph passes through the point (0,1)
2. The domain is all real numbers.
3. The range is y>0.
4. The graph is increasing.
5. The graph is asymptotic to the x-axis as x approaches negative infinity.
6. The graph increases without bound as x approaches positive infinity.
7. The graph is continuous.

How do you find the asymptote of an exponential graph?

Exponential Functions A function of the form f(x) = a (bx) + c always has a horizontal asymptote at y = c. For example, the horizontal asymptote of y = 30e–6x – 4 is: y = -4, and the horizontal asymptote of y = 5 (2x) is y = 0.

#### What is the general exponential function?

An exponential function is a function in which the independent variable is an exponent. Exponential functions have the general form y = f (x) = ax, where a > 0, a≠1, and x is any real number.

#### Can an exponential graph reach zero?

The amount will never reach zero because it will keep on getting cut in half but there is no number that can be divided 2 to get 0 apart from 0. There are an infinite amount of decimals and the number will continue to get smaller and smaller but there will never be 0 grams of the substance.

What does an exponential graph look like?

An exponential growth function can be written in the form y = abx where a > 0 and b > 1. The graph will curve upward, as shown in the example of f(x) = 2x below. Notice that as x approaches negative infinity, the numbers become increasingly small.

What is 1 x called?

In mathematics, a multiplicative inverse or reciprocal for a number x, denoted by 1/x or x−1, is a number which when multiplied by x yields the multiplicative identity, 1.

## What happens to the graph of an exponential function?

Sketch the graph of State the domain, range, and asymptote. Transformations of exponential graphs behave similarly to those of other functions. Just as with other parent functions, we can apply the four types of transformations—shifts, reflections, stretches, and compressions—to the parent function without loss of shape.

## What does an asymptote of an exponential function tell us?

An asymptote is a line that the graph of a function approaches, as either increases or decreases without bound. The horizontal asymptote of an exponential function tells us the limit of the function’s values as the independent variable gets either extremely large or extremely small.

Which is the domain of an exponential function?

The domain of is all real numbers, the range is and the horizontal asymptote is An exponential function with the form [latex]\\,b>0, [/latex] has these characteristics: (Figure) compares the graphs of exponential growth and decay functions.

How do you find the value of an exponential function?

To find the value of we compute the point of intersection. Press [2ND] then [CALC]. Select “intersect” and press [ENTER] three times. The point of intersection gives the value of x for the indicated value of the function. Solve graphically. Round to the nearest thousandth. Press [Y=] and enter next to Y1 =.