Find the point of intersection of the graphs of linear functions y = 5x + 1 and -3x + 4
August 13, 2021 | education
| In order to find the point of intersection of the graphs of linear functions given by the equations y = 5x + 1 and y = -3x + 4, we solve a system of these equations.
System of equations:
y = 5x + 1;
y = -3x + 4.
We will solve the system by the substitution method. Substitute -3x + 4 for y in the first equation.
System of equations:
-3x + 4 = 5x + 1;
y = -3x + 4.
We solve the first equation of the system:
-3x – 5x = 1 – 4;
-8x = -3;
x = -3: (-8);
x = 3/8.
System of equations:
x = 3/8;
y = -3 * 3/8 + 4 = -9/8 + 32/8 = 23/8.
Answer: (3/8; 2 7/8).
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