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avatar+25 

graph the function

f of x= 2x+1

pls help me understand. I want to understand, not look it up online and get the answer. I just wanna know how

 May 30, 2019
 #1
avatar+103917 
+2

f(x) = y

 

y = 2x + 1

 

We have the form  y  = mx + b

 

The y intercept  = (0, b)

So here...the y intercept  = 1  means the point (0, 1)

 

The slope is the value in front of the "x"  = 2  =  2/1

This means that y changes by 2  when x changes by 1

So....a second point on the graph  is  ( 0 + 1, 1 + 2)  = (1, 3)

 

Plot  (0, 2)  and (1, 3)....draw a line through them....this is your graph

 

cool cool cool

 May 30, 2019
 #2
avatar+25 
-4

whoops, sorry there were parentheses:f(x)=[2x+1]

ProffesorNobody  May 30, 2019
 #3
avatar+103917 
+2

The parentheses don't matter......

 

y = [ 2x + 1 ]  = 2x + 1

 

cool cool cool

CPhill  May 30, 2019
 #4
avatar+25 
-4

oh sorry i thought it meant something

ProffesorNobody  May 30, 2019

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