Algebra 1 Semester Exam Review

2. Slope is the rate of ____________ of a line.
4. The only number that is not positive or negative.
6. The ___________ formula is used to find any term in an arithmetic sequence: a(n)=a(1)+(n-1)d
10. A letter used to represent a number
13. The value of a fraction is zero when zero is in the ____________ of the fraction.
14. y-y1=m(x-x1)
15. The set of all outputs or y-values.
17. The point(0, 0) on a coordinate grid.
19. Two lines in the same plane that meet at right angles (90 degrees).
22. A ____________ inequality is two inequalities joined by the word "and" or "or".
23. The inverse of division.
26. In standard form, A, B, and C must be this kind of number.
28. _____________ operations undo each other.
29. A relation where each input value has only one output value.
30. The value of a fraction is undefined when zero is in the ____________ of the fraction.
31. A graph that goes uphill from left to right has a ________________ slope.
33. Every point on the graph of an equation is a ________________ to the equation.

1. (y2-y1)/(x2-x1)
3. The inverse of subtraction.
5. A statement formed when an equal sign is placed between two expressions.
7. Two lines in the same plane that do not intersect.
8. y=mx+b
9. The line with the equation y=a number.
10. The __________ line test is used to tell if a graph is a function.
11. The type of sequence where each term increases or decreases by a constant value.
12. The ____________ formula is used to find the next term in an arithmetic sequence: a(n+1)=a(n)+ d when a(1) is the first term.
16. The ___________ difference is the constant difference between terms in an arithmetic sequence.
18. The slope of a vertical line.
20. The property where a(b+c)=ab+ac.
21. Perpendicular lines have slopes that are opposite _____________.
24. Equations that graph as straight lines.
25. An equation that is true for all values of the variables.
27. The set of all inputs or x-values.
32. Ax+By=C