Find the point slope equation for the line that passes through the points (2,1) and (-2,5). use the first point in your equation.
y- [?]=[?](x-[?])

y - 1 = -(x - 2)

Step-by-step explanation:

y - y1 = m(x - x1)

m = (5-1)/(-2-2) = 4/-4 = -1

Using any one coordinate, construct

y - y1 = m(x - x1)

y - 1 = -1(x - 2)

Yo sup??

By applying slope point formula ie

y-y1=m(x-x1)

we get

m=y2-y1/x2-x1

=5-1/-2-2

=-1

y-1=-1(x-2)

y+x=3

Hope this helps

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value