Question

How do you write an equation of a line going through (1,2) (-1,2)?

Answer 1

`y=2`

`"Equation of a straight line parallel to the X-axis"`

Explanation:

`"First find the slope of the line passing through the two "`
`"points (1,2) and (-1,2)"`

`slope=(y_2-y_1)/(x_2-x_1)`

`slope =((2-2))/(((-1)-1))`

`slope =0`

`y=a*x+b`

`"the point "(1,2)" is a point on the line."`

`y=0*(1)+2`

`y=2 " is the equation of a straight line parallel to the X-axis."`

graph{0*x+2 [-2.662, 2.74, -0.276, 2.423]}