The linear equation in the graph can be written as:
y = 4x - 1
How to determine the equation of the line?
A general linear equation can be written as:
y = a*x + b
Where a is the slope and b is the y-intercept.
Looking at the graph we can see that the y-intercept is at y = -1, so we can write:
y = ax - 1
And the line passes through (2, 7), replacing these values we will get:
7 = 2a - 1
7 + 1 = 2a
8 = 2a
8/2 = a
4 = a
The equation is y = 4x - 1