y = 2x + 1 IS a linear equation!
Yes.
y= 2x-3 when y=0 2x=3 x=1.5
4
The rate of change for the linear (not liner) function, y = 2x +/- 3 is 2.
3
8
An identity. If you add y to both sides, you get 2x = 2y x = y
Y = 2X + 8 is a linear function of the form, Y = mX + c. A line.
This is non-linear
Yes. 6 - y = 2x -y = 2x -6 y= -2x +6 If plotted on a graph, the line will have a gradient -2, and will intercept the axes at (0,6) and (3,0).
2x plus y = -3 (subtract 2x from both sides) y = -2x - 3 slope = -2 y-intercept = -3