Question

Precalculus Piecewise Functions Help?
Determine which is the graph of the function of f(x)= {3x+2 if x<5}
{-3x-2 if x>=5}

Answer 1

@pooja195 could you help me solve this? I'm not sure where to start.

Answer 2

draw a line y=3x+2 for x<5
and another line y=-3x-2 for x>5

Answer 3

Okay one minute let me draw it. Thank you so much!

Answer 4

Okay, but also how do I draw those lines on a graph? Isn't there a certain method that I need to do in order to graph the lines? @surjithayer

Answer 5

when x=0,y=3*0+2=2
when x=4,y=3*4+2=14
draw a st. line through (0,2) and (4,14)

Answer 6

Okay, but where are you getting these numbers from my equation? Sorry I'm just a bit confused.

Answer 7

These are my graphs that I have to choose from.

Answer 8

@surjithayer

Answer 9

Thank you. So this is how my graph should look?

Answer 10

now you can draw y=-3x-2 for x>5
when x=6 ,y=-3*6-2=-20
x=8,y=-3*8-2=-26
now draw aline through (6,-20) and (8,-26)

Answer 11

here x>=5

Answer 12

Okay so I'm drawing another line on the graph with the given points correct?

Answer 13

Okay thank you