Question

How do I graph y=3x+3? This is for a homework assignment but I don't quite understand how to do it.

Answer 1

Please???

Answer 2

y=3x+3
is the equation of a line
one way is to find two points on the line, and then draw a line through those two points.

Answer 3

Start with the y intercept with in this case is +3

Answer 4

Then use the slope to find the next point so up 3 over 1

Answer 5

to find a point, try x=0
can you find y when x is 0 ?

Answer 6

to find y, when x is 0, erase the x and put in zero
y = 3*0 + 3
what is 3 time 0 ? and then add 3 ?

Answer 7

I don't get it sorry im not that great at math. can you explain it a different way?

Answer 8

would y be 9

Answer 9

what is 3 times 0 ?

Answer 10

0

Answer 11

so we start with
y =3x+3
put in 0 for x:
y = 3*0 + 3
do the operations: remember order of operations, first do the multiply
3*0=0 as you know, so we have
y = 0+3
what is y ?

Answer 12

I think it is 3.

Answer 13

yes
y=0+3
and 0+3 is 3, so
y=3

all of that work means (0,3) is a point on the line.
now we find another point. try x=1
in
y= 3x+3
can you try ?

Answer 14

y = 6.

Answer 15

I think I got it now.

Answer 16

so (1,6) is another point.
do you know how to plot the points (0,3) and (1,6) ?

Answer 17

Not really

Answer 18

if you have time, see
https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-geometry-topic/cc-5th-coordinate-plane/v/graphing-points-exercise

Answer 19

OK thanks

Answer 20

Thanks Phi and Ashes.Boom for helping.