## What is the basic log function?

The “basic” logarithmic function is the function, y=logbx, where x, b>0 and b≠1.

## What can you say about the graph of a logarithmic function?

The graph of a logarithmic function has a vertical asymptote at x = 0. The graph of a logarithmic function will decrease from left to right if 0 < b < 1. And if the base of the function is greater than 1, b > 1, then the graph will increase from left to right.

**What does a log function look like?**

The logarithmic function may look like the graph below. The negative in front of the function reflects the function over the x-axis, but all other properties of the logarithmic function hold. Here, as a decreases, the magnitude of a increases. As this happens, the graph decreases at a quicker rate as x increases.

**How do you identify a log graph?**

It can be graphed as:

- The graph of inverse function of any function is the reflection of the graph of the function about the line y=x .
- The logarithmic function, y=logb(x) , can be shifted k units vertically and h units horizontally with the equation y=logb(x+h)+k .
- Consider the logarithmic function y=[log2(x+1)−3] .

### How do you tell the difference between an exponential and logarithmic graph?

As you can tell from the graph to the right, the logarithmic curve is a reflection of the exponential curve….Comparison of Exponential and Logarithmic Functions.

Exponential | Logarithmic | |
---|---|---|

Function | y=ax, a>0, a≠1 | y=loga x, a>0, a≠1 |

Domain | all reals | x > 0 |

Range | y > 0 | all reals |

### How can logarithms be graphed with different bases?

Using change of base formula or graphing W technology. How can logarithms be graphed with different bases? Adding or subtracting to the equation causes the graph to shift.

**What does it mean for a graph to be log based?**

A log graph, formally known as a semi-logarithmic graph, is a graph that uses a linear scale on one axis and a logarithmic scale on the other axis. It’s useful in science for plotting data points of two variables where one of the variables has a much larger range of values than the other variable.

**How do you calculate the graph of a function?**

Write down the relation. A relation is a set of ordered pairs with of x and y coordinates.

#### How do you graph log?

y= log2(x) The graph of the square root starts at the point (0, 0)and then goes off to the right. On the other hand, the graph of the log passes through (1, 0), going off to the right but also sliding down the positive side of the y-axis. Remembering that logs are the inversesof exponentials, this shape for the log graph makes perfect sense: the graph of the log, being the inverse of the exponential, would just be the “flip” of the

#### How to graph a logarithm function?

– Find the domain of f and range of f. – Find the vertical asymptote of the graph of f. – Find the x and y intercepts of the graph of f if there are any. – Sketch the graph of f.

**How can you tell which graph is a function?**

Relation: It is a group of ordered pairs.