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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

4. Graphing Linear Equations in Standard Form

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Exercise 27 Page 134

What does the x-intercept tell us?

No, see solution.

Practice makes perfect

The intercepts of a function tell us where the graph will cross each axis. The x-intercept tells us where the graph will cross the x-axis when y=0.

Therefore, if we want to find the x-intercept a, we have to substitute 0 for y and solve the equation for x. Our friend had it backwards.

Subchapter links

Communicate Your Answer p.129

Monitoring Progress p.130-132

Exercises p.133-134