Answer:
option 3
y = x² - 1
Explanation:
the equation of the graph is written as,
y = mx + b
where b is the y-intercept form which according to the given graph is -1
b = -1
slope m, = y2-y1 / x2-x1
let's take any two points from the given graph (-1,-2), (-2,-4)
m = -4 + 2 / -2 + 1 = -2/-1 = 2
thus, the equation for the graph is,
y = 2x - 1 or
y = x² - 1