Question

How to write equation of lines given certain information

Answer 1

y = mx + c, where m is the gradient of the line, and c is the y value when x = 0.

Answer 2

m = slope, c = y intercept

I doubt they understand gradient at this stage:)

Answer 3

so the basic equation for a line is y=mx+b (I use b not c)
m is slope, and b is the y intercept (the value of y when x=0)

1) if you are given two points (x_0,y_0), and (x_1,y_1) then you can find slope with this equation
slope = m = (y_0-y_1)/(x_0-x_1)
now we know what the slope is
now use the either point to find the value of b by subbing in the x value and y value

example:
(2,2), (3,3)
slope = m = (3-2)/(3-2) = 1
so we know m =1
y=mx+b ----> y=1x+b
*use one of the points to find b, ill use (3,3)
y=3,x=3 so
3=1*3+b
so b = 0
our equation is
y=1*x+0
or y=x

2) you are given a point and slope
start from the line with *

Answer 4

@imanicf

Answer 5

Cool cool :)