Answer:
y-intercept = -2
y = 1.5x - 2
Step-by-step explanation:
y-intercept is the point where a graph crosses the y-axis, it's the value of y when x=0.
On the graph we can see that this it a point (0; -2).
So y-intercept = -2.
As it is the line the equation will be linear: y = k·x + b.
We can find the value of k, the gradient, by forming a right-angled triangle using the coordinates of the two points.
From the graph we see the easiest point to fird coordinates.
These are (0; -2) and (2; 1), for example.
k = change in y / change in x
k = (1-(-2)) / (2-0)
k = 3/2 = 1.5
And b = y-intercept.
So, the equation will be y = 1.5x - 2.
