Question

score: 16/30 penalty: 1 off
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find the value of f(-8).
y = f(x)
(graph of a parabola y = f(x) with x-axis from -10 to 10 and y-axis from -10 to 10)
answer attempt 1 out of 2

Explanation:

Step1: Locate x = -8 on x - axis

Find the point where \( x=-8 \) on the horizontal (x -) axis of the graph \( y = f(x) \).

Step2: Find corresponding y - value

From the point \( x = - 8 \) on the x - axis, move vertically until intersecting the graph of \( y=f(x) \). Then, find the corresponding y - value (which is the value of \( f(-8) \)) by checking the y - axis. Looking at the graph, when \( x=-8 \), the y - coordinate of the point on the graph is - 5 (by visually inspecting the grid and the curve's position at \( x = - 8 \)).

Answer:

\( f(-8)=-5 \)