Question

The graph represents the piecewise function

Answer 1

Answer:

The piecewise function is

$f(x)=\begin{cases}2x-1&\text{ if }x\leq-1\\ x+4&\text{ if } x\geq1 \end{cases}$

Step-by-step explanation:

From the given graph it is noticed that the graph is divides into two pieces.

The first function is defined for all values of x which are less than or equal to -1. The second function is defined for all values of x which are greater than or equal to 1.

The equation of line which passing through two points is

$y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)$

The first line is passing trough (-1,-3) and (-2,-5).

$y-(-3)=\frac{-5-(-3)}{-2-(-1)}(x-(-1))$

$y+3=\frac{-2}{-1}(x+1)$

$y+3=2(x+1)$

$y=2x+2-3$

$y=2x-1$

For $x\leq-1$ the function is defined as,

$f(x)=2x-1$

Similarly the second line is passing through (1,5) and (2,6).

$y-5=\frac{6-5}{2-1}(x-1)$

$y-5=1(x-1)$

$y=x+4$

For $x\geq-1$ the function is defined as,

$f(x)=x+4$

Therefore, the piecewise function is,

$f(x)=\begin{cases}2x-1&\text{ if }x\leq-1\\ x+4&\text{ if } x\geq1 \end{cases}$

Answer 2

Ok, so so we gots from x≤-1 and x≥1 for the bounds

hmm, the x≤-1 one

hmm, looks like the y intercept is -1 and the slope is 2/1
y=2x-1
test (-1,-3)
works
test (-2,-5)
works

yep

2x-1 is first blank



the other one

seems to have y intercept at 4 and slope of 1
y=1x+4
y=x+4
this works because I tested it



top left: 2x-1
top right: x≤-1 or x is less than or equal to -1
bottom left: x=4
bottom left: x≥1 or x is greater than or equal to 1