Graphing straight lines: y = x + 2

[Ninigirl750]

Graph the following: y = x + 2

 

[arthur ohlsten]

y=x+2 a straight line
two points determine a straight line
let x=0 then y=2
let x=2 then y=4

plot these two points, and then pass a straight line thru the points

Arthur

 

[Ninigirl750]

Thanks,
Would you do the Same If it was Y + 3 = -1/3x

 

[arthur ohlsten]

y+3=-1/3 x
equation of a straight line is y=mx+b, rearrange the equation by subtracting 3 from each side of the = sign
y=-1/3 x -3 a straight line of slope -1/3 , and y intercept of -3

two points determine a straight line
let x=0 then y=-3
let x=3, then y=-4

plot the two points: 0,-3 and 3,-4
draw a straight line thru these two points
Arthur