Question

evaluate functions from a graph
score: 13/30 penalty: 1 off
question
find the value of f(-9).
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 = -9 on x - axis

Find the position of \( x=-9 \) on the horizontal (x - axis) of the graph.

Step2: Find corresponding y - value

From \( x = - 9\), move vertically (up or down) until intersecting the graph of \( y = f(x) \). The y - value at this intersection is \( f(-9) \). Looking at the graph, when \( x=-9 \), the point on the graph has a y - coordinate of 1 (since it's on the line \( y = 1\) at \( x=-9 \)).

Answer:

\( 1 \)