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Pearson Algebra 1 Common Core, 2011

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Pearson Algebra 1 Common Core, 2011 View details

1. Zero and Negative Exponents

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Exercise 77 Page 423

Substitute 0 for x in the equation.

4

Practice makes perfect

To find the y-intercepts, we will need to substitute 0 for x and solve the equation. Think of the point where the graph of an equation crosses the y-axis. The x-value of that ( x, y) coordinate pair is equal to 0, and the y-value is the y-intercept. To find the y-intercept of the given equation, we should substitute 0 for x and solve for y.

3x-2y=-8

x= 0

3( 0)-2y=-8

Zero Property of Multiplication

-2y=-8

.LHS /-2.=.RHS /-2.

y=4

The graph passes through the y-axis at the point (0, 4).

Subchapter links

Lesson Check p.421

Practice and Problem-Solving Exercises p.421-423

Standardized Test Prep p.423

Mixed Review p.423