Question

Coordinate Plane I HELP PLEASE

Answer 1

Slope-intercept is the y = m*x+ b form

m= slope = rise/run
b=y axis intercept value

Answer 2

okay..

Answer 3

for the red line would it be 0/4 for rise/run?

Answer 4

no, that would be a hporizontal line, rise zero and run 4

Answer 5

and i dont know why b is

Answer 6

yes thats what i said no?

Answer 7

To figure the slope m, look for 2 points that are on the line, for the red
(0, -1) and (1,0) look good

the slope is difference in y values over difference in x values,

m = (0 - -1)/(1-0) = 1/1 = 1

Answer 8

have to be careful because the scale is different on the vertical axis, 2 per box instead of 1 like on the x

Answer 9

oh okay :/

Answer 10

im still confused

Answer 11

sorry, i made a small error, (1,0) not on red line, should be (1,1)

slope is then m = (1 - -1)/1 = 2
y-axis intercept b is at -1

put together slope intercept form y=m*x+b

y=2x-1

Answer 12

oh ok

Answer 13

The blue line will have a negative slope, it slants down moving left to right

do the same thing, use 2 points on the line and calculate slope m,
the y-intercept is at b=2

put together y=mx+b same way

Answer 14

uh

Answer 15

2 points that are easy to read off the picture on the blue line are

(0,2) and (2,0)

the slope m=(0-2)/(2-0) = -2/2 = -1

Answer 16

for every 1 unit you move right, you move 1 unit down (-1) slope -1

Answer 17

i need to run, this is what you need for the last 2 (3rd is same as first 2)

perpendicular slope is the negative reciprical, (#4 perpendicular to blue line take blue lines slope m and flip it upside down and change the sign on it) so blue is slope -1, or -1/1, the perpendicular slope is then +1/1 or +1

parallel means same slope for both lines

given a point and a slope you find, put together th epoint - slope form
(y - y1) = m*(x-x1)

where (x1 , y1) is the given point, and m is th eslope you find

just rearrange that to the y=mx+b sform after you put the values in

Answer 18

GL