Below are the steps to solve an equation:
1 answer:
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Answer:
see explanation
Step-by-step explanation:
Given
y = x² - 2x - 8
To find the x- intercepts let y = 0 , that is
x² - 2x - 8 = 0 ← in standard form
(x - 4)(x + 2) = 0 ← in factored form
Equate each factor to zero and solve for x
x - 4 = 0 ⇒ x = 4
x + 2 = 0 ⇒ x = - 2
x- intercepts : x = - 2, x = 4
The x- coordinate of the vertex is mid way between the x- intercepts, that is
=
=
= 1
Substitute x = 1 into the equation for corresponding y- coordinate
y = 1² - 2(1) - 8 = 1 - 2 - 8 = - 9
vertex = (1, - 9 )
Answer:
I put in a screenshot on what the graph would look like (i used desmos)
Step-by-step explanation:
Ok, you have the equation y=3-4x. This can be broken down into the y=mx+b format. -4 would be the m, and since m is the slope -4 would be the slope of your line. 3 would be your b- your y-intercept. Basically at (0,3) your line crosses the y-axis.
I hope this helps :)
