Your first step is to simplify your equation so that there is only one variable and one term in your linear function.
f(x) = 14(3x+2) - 4x
f(x) = 42x + 28 - 4x
f(x) = 42x - 4x + 28
f(x) = 38x + 28
I'm guessing you entered the equation wrong because that would be a very, very steep line and you'd probably run out of space in the graph if it's on paper. Start at coordinate (0, 28), place a point. This is your y-intercept. Then count up 38 units on the y-axis and then to the right 1 unit on the x-axis in order to graph that.
If your equation is f(x) = 4(3x + 2) - 4x, that one is more manageable. You do the same steps, just simplify.
f(x) = 4(3x + 2) - 4x
f(x) = 12x + 8 - 4x
f(x) = 12x - 4x + 8
f(x) = 8x + 8
For this, you would place a point at coordinate (0, 8), again y-intercept; from there count 8 units up, 1 unit right and place another point; go back to (0, 8), count 8 units down, 1 left and place a point; connect all three dots and there's your line.
