Answer:
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Step-by-step explanation:
The point-slope form of an equation of a line:

m - slope
(x₁, y₁) - point
The formula of a slope:

From the table we have the points (-10, 8) and (10, 4). Substitute:

The equation of a line:

C) 13
The y value adds one by every x; therefore 4 would be 13.
Answer:
-3
Step-by-step explanation:
In short, for a vertical parabola, namely one whose independent variable is on the x-axis, usually is x², if the leading term coefficient is negative, the parabola opens downward, and its peak or vertex is at a maximum, check the picture below at the left-hand-side.
and when the leading term coefficient is positive, the parabola opens upwards, with a minimum, check the picture below at the right-hand-side.