Find the point of intersection of the graphs of the functions y = 2x + 1 and y = 4x + 3.
September 12, 2021 | education
| Find the point of intersection of the graphs of the functions y = 2x + 1 and y = 4x + 3. In the answer, write down the product of coordinates.
To find the point of intersection of the graphs, you will need to solve a system of equations from the presented two functions, since x and y are common for both functions are their solution and the point of their intersection:
y = 2 * x + 1;
y = 4 * x + 3;
2 * x + 1 = 4 * x + 3;
4 * x – 2 * x = 1 – 3;
2 * x = -2;
x = -2: 2 = -1;
y = 2 * x + 1 = – 2 + 1 = – 1;
Let’s check for the second function:
y = 4 * x + 3 = -4 + 3 = – 1.
The graphs intersect at a point with coordinates: x = -1; y = -1.
Their work will be:
x * y = -1 * (- 1) = 1.
Answer: 1.
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