Solve the following pairs of linear equations by graphing. Confirm the solution using algebra.
y = 4x + 2 and y = — 2
Intersection at (-2, —6)
x = —2
Y —6
Solution using algebra
Standard form:
Combining the equations: Equations are already in standard form 4x + 2 = 2x— 2
2x = — 4
x =— 2
Substituting into eql y = 4(-2) + 2
y = 6
Check substituting into eq2 y = 2 (-2) —2
y=-6
Solution: x=-2,y=-6
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