Answer:
To know the equation of line we need 2 things
slope and y intercept
slope= (y2-y1)÷(x2-x1)
y intercept is y when x =0
then put them in formula f(x)=mx+c
m = slope, c= y intercept
1: slope = 1. y intercept = 4
f(x)=x+4
2: slope = -9/2. y intercept = 11/2
f(x)= -9/2x+(11/2)
3: slope = 1/3. y intercept = -11/3
f(x)=x/3+(-11/3)
4: slope = -1. y intercept = 7
f(x)=-x+7
5: slope = 1. y intercept = -2
f(x)=x+-2
