# How to find f 3 on a graph

## How do you find F 3 on a graph?

## How do you find the value of F 3?

The value of f(-3) is found

**by substituting -3 into the equation per variable**, solving and simplifying as needed, to get the answer. For instance if f(x)=3x^2, the value of f(-3) is 3(-3)^2, which is 27.## What does find F 3 mean?

Explanation: Simply

**substitute the value of 3 given**. In other words, f(3) is the function of f(x) , however, in this case, x is 3.## What does F 3x do to a graph?

If g(x) = 3f (x): For any given input, the output iof g is three times the output of f, so the graph is stretched vertically by a factor of 3. If g(x) = f (3x): For any given output,

**the input of g is one-third the input of f**, so the graph is shrunk horizontally by a factor of 3.## How do you find the value of FFX?

## Which is f (- 3 for the quadratic function graphed?

From the given graph of the quadratic equation, it is clear that it is an upward parabola, with its vertex at (-3, -9). Looking at the graph, when we check the y-coordinates corresponding to x = -3, we get

**f(-3) = -9**.## What type of transformation is F 3x?

Translations and the Effect on Domain & Range

Graph | Translation | Range |
---|---|---|

y=f(3x) | divide each x by 3 | [4,8] |

y=2f(x-3)-5 | multiply each y by 2 and subtract 5; add 3 to every x | [3,11] |

y=-f(x) | reflect about x-axis | [-8,-4] |

y=1/f(x) | take the reciprocal of each y | [1/8,1/4] |

## How do you read YFX files?

The notation

**y=f(x) y**= f ( x ) defines a function named f . This is read as “y is a function of x .” The letter x represents the input value, or independent variable.## How do you work out YF 2x?

## When you multiply a function by what is the effect on its graph?

When you multiply the input of f(x) by a constant, b, the graph of f(x)

**is stretched horizontally**. Only the y-intercepts remain fixed.## What is dilation on graph?

A dilation is

**a transformation which preserves the shape and orientation of the figure, but changes its size**. The scale factor of a dilation is the factor by which each linear measure of the figure (for example, a side length) is multiplied.## How do you do transformations on a graph?

**5 Steps To Graph Function Transformations In Algebra**

- Identify The Parent Function. Ernest Wolfe. …
- Reflect Over X-Axis or Y-Axis. …
- Shift (Translate) Vertically or Horizontally. …
- Vertical and Horizontal Stretches/Compressions. …
- Plug in a couple of your coordinates into the parent function to double check your work.

## How do you multiply on a graph?

You need to find the

**x values on both lines**and multiply them together to find the value for the new graph of f*g(x). For example at x=4, g(4)=0 and f(4)=4 so f*g(4)=0 (multiply the two values together). When x=6, g(6)=-1 and f(6)=6 so f*g(6)=-6.## What happens if you multiply a function by 2?

When you multiply two functions together, you’ll

**get a third function as the result**, and that third function will be the product of the two original functions. For example, if you multiply f(x) and g(x), their product will be h(x)=fg(x), or h(x)=f(x)g(x). You can also evaluate the product at a particular point.## How do you multiply points on a graph?

## How do you multiply numbers?

## What is FX multiplication?

**Stretching and Compressing Graphs**

If we multiply a function by a coefficient, the graph of the function will be stretched or compressed. Given a function f(x), we can formalize compressing and stretching the graph of f(x) as follows: A function g(x) represents a vertical stretch of f(x) if g(x) = cf(x) and c > 1.