Questions: Graphs and Functions
Graphing an absolute value equation in the plane: Advanced
Graph the equation.
y=-4x+4+3
Transcript text: Graphs and Functions
Graphing an absolute value equation in the plane: Advanced
Graph the equation.
\[
y=-4|x+4|+3
\]
Solution
Solution Steps
Step 1: Find the vertex.
The vertex of the absolute value function _y_ = _a_|_x_ - _h_| + _k_ is at the point (_h_, _k_). In this case, the function is _y_ = -4|_x_ + 4| + 3, so _h_ = -4 and _k_ = 3. The vertex is at (-4, 3).
Step 2: Determine the slope.
The slope of the branches of the absolute value function is given by _a_. In this case, _a_ = -4. Since _a_ is negative, the graph opens downward.
Step 3: Plot points.
Starting from the vertex (-4, 3), move one unit to the right and four units down (slope = -4). This gives the point (-3,-1). From the vertex, move one unit to the left and four units down. This gives the point (-5, -1).
Step 4: Draw the graph.
Draw lines connecting the vertex to the points (-3, -1) and (-5, -1) and extending outwards. These lines form the graph of the absolute value function.
Final Answer
The graph is a V-shape opening downwards with vertex at (-4, 3) and passing through points (-3, -1) and (-5, -1).