Algebra 1 2010 SOL Released Test

Front

What is a system of equations?

Back

A set of two or more equations with the same variables. The solution is the point(s) where the equations intersect.

Front

How do you find the solution to a system of linear equations graphically?

Back

Plot both equations on a graph and identify the point where they intersect.

Front

What is scientific notation?

Back

A way of expressing numbers that are too large or too small to be conveniently written in decimal form, using powers of ten.

Front

How do you subtract numbers in scientific notation?

Back

Align the exponents, convert to the same power of ten, and then subtract the coefficients.

Front

What is the slope of a line?

Back

The ratio of the rise (change in y) to the run (change in x) between two points on the line.

Front

How do you calculate the slope between two points (x1, y1) and (x2, y2)?

Back

Slope (m) = (y2 - y1) / (x2 - x1).

Front

What does the y-intercept represent in a linear equation?

Back

The value of y when x = 0; it is the point where the line crosses the y-axis.

Front

What is the formula for a linear function?

Back

f(x) = mx + b, where m is the slope and b is the y-intercept.

Front

How do you evaluate a linear function for a given value of x?

Back

Substitute the value of x into the function and simplify to find f(x).

Front

What is the difference between independent and dependent variables?

Back

The independent variable is the input (x), while the dependent variable is the output (y) that depends on the input.