Quick Answer: How Do You Tell If A Graph Is Horizontally Stretched Or Compressed?

How do you know if a function is reflected?

Another transformation that can be applied to a function is a reflection over the x– or y-axis.

A vertical reflection reflects a graph vertically across the x-axis, while a horizontal reflection reflects a graph horizontally across the y-axis..

How do you do a vertical stretch by a factor of 2?

Thus, the equation of a function stretched vertically by a factor of 2 and then shifted 3 units up is y = 2f (x) + 3, and the equation of a function stretched horizontally by a factor of 2 and then shifted 3 units right is y = f ( (x – 3)) = f ( x – ). Example: f (x) = 2×2.

How do you identify the domain and range of a function?

Another way to identify the domain and range of functions is by using graphs. Because the domain refers to the set of possible input values, the domain of a graph consists of all the input values shown on the x-axis. The range is the set of possible output values, which are shown on the y-axis.

How do you tell if a graph is vertical or horizontal stretch?

Key Points If b>1 , the graph stretches with respect to the y -axis, or vertically. If b<1 , the graph shrinks with respect to y -axis. in general, a horizontal stretch is given by equation f(cx) f (c x ) .

What is the difference between vertical compression and horizontal stretch?

A vertical compression (or shrinking) is the squeezing of the graph toward the x-axis. … A horizontal compression (or shrinking) is the squeezing of the graph toward the y-axis. • if k > 1, the graph of y = f (k•x) is the graph of f (x) horizontally shrunk (or compressed) by dividing each of its x-coordinates by k.

How do you stretch and shrink a graph?

We can also stretch and shrink the graph of a function. To stretch or shrink the graph in the y direction, multiply or divide the output by a constant. 2f (x) is stretched in the y direction by a factor of 2, and f (x) is shrunk in the y direction by a factor of 2 (or stretched by a factor of ).

What does a vertical shrink look like?

The y -values are being multiplied by a number between 0 and 1 , so they move closer to the x -axis. This tends to make the graph flatter, and is called a vertical shrink. In both cases, a point (a,b) on the graph of y=f(x) y = f ( x ) moves to a point (a,kb) ( a , k b ) on the graph of y=kf(x) y = k f ( x ) .

What does a horizontal stretch look like?

A horizontal stretch or shrink by a factor of 1/k means that the point (x, y) on the graph of f(x) is transformed to the point (x/k, y) on the graph of g(x).

How do you know if compression is vertical or stretched?

When we multiply a function by a positive constant, we get a function whose graph is stretched or compressed vertically in relation to the graph of the original function. If the constant is greater than 1, we get a vertical stretch; if the constant is between 0 and 1, we get a vertical compression.

How do you tell if a function is even or odd?

You may be asked to “determine algebraically” whether a function is even or odd. To do this, you take the function and plug –x in for x, and then simplify. If you end up with the exact same function that you started with (that is, if f (–x) = f (x), so all of the signs are the same), then the function is even.

How do you tell if a graph is stretched or compressed?

When we multiply a function by a positive constant, we get a function whose graph is stretched or compressed vertically in relation to the graph of the original function. If the constant is greater than 1, we get a vertical stretch; if the constant is between 0 and 1, we get a vertical compression.

How do you horizontally compress a function?

To shrink or compress horizontally by a factor of c, replace y = f(x) with y = f(cx). Note that if |c|<1, that's the same as scaling, or stretching, by a factor of 1/c.

How can you tell the difference between vertical and horizontal?

A vertical line is any line parallel to the vertical direction. A horizontal line is any line normal to a vertical line. Horizontal lines do not cross each other. Vertical lines do not cross each other.

What is a horizontal shift?

Horizontal shifts are inside changes that affect the input ( x- ) axis values and shift the function left or right. Combining the two types of shifts will cause the graph of a function to shift up or down and right or left.