Find the coordinates of the intersection points of the graphs of the functions y = X / 2 and y = 3x-5
August 14, 2021 | education
| In order to find the coordinates of the intersection point of the graphs of the functions given by the equations y = x / 2 and y = 3x – 5 without performing the construction, we will solve the system of these equations.
System of equations:
y = x / 2;
y = 3x – 5.
We solve the system using the substitution method.
Let’s substitute in the first equation instead of y the expression from the second equation.
System of equations:
x / 2 = 3x – 5;
y = 3x – 5.
We solve the first equation of the system:
x / 2 = 3x – 5;
x = 6x – 10;
x – 6x = -10;
-5x = -10;
x = -10: (-5);
x = 2.
System of equations:
x = 2;
y = 3 * 2 – 5 = 6 – 5 = 1.
Answer: (2; 1).
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