Question

Graph the linear equation. y = 3x – 4

Answer 1

Assume that a Value of x And put this in the equation above to get the value of y
now plot the point (x,y) on the graph ....

In example, Lets assume x equals 1

then y = -3x -4
=> y = -3(1) - 4
= -3-4
= -7
so plot point (1,-7)

also as this is a linear equation it represents a st line
And any st. line can be defined by only two points

So, now assume x equals 2 or -1 (any value you want really but lets say -1)
So x=-1

put in the equation to get y

y = -3x -4
= -3*(-1) -4
= 3-4
= -1
so point is (-1,-1)

Now plot the points P1(1,-7) and P2(-1,-1)

And join the two points (P1 & P2) and you get your graph for this problem. Hope I helped.