Algebra Review

^{What is the solution?} 

• 1
• -2
• (1, 2)
• (1, -1)

Slope Intercept Form of a Linear Equation

• y = mx + b

• y - y1 = m (x - x1)

• Ax + By = C

• y + x = b

When would we get "infinitely many solutions" to a system of equations?

• The lines are parallel, never intersecting

• The lines cross at one point

• The lines are the same and overlap at all points

• The lines cross at 2 points

When will we get "no solutions" from a system of equations?

• The two lines cross once

• The two lines are the same and overlap

• The two lines are parallel and never touch

• The two lines cross at 2 points

The first step of solving a system of linear equations is putting the equations in ______-intercept form

Match the following graphs to the systems of equations

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Which is the graph of the equation y = -2x + 1?

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Which graph best represents the equation y = -3x + 4?

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Solve by Substitution:

x = -3y - 17

2x + 3y = -7

• (1, -20)

• (3, 0)

• (-5, -2)

• (10 , -9)