Flashcard Review - Scientific Notation, Squares, Slopes

Front

What is scientific notation?

Back

A way to express very large or very small numbers using powers of ten. For example, 3000 can be written as 3 x 10^3.

Front

How do you convert a number to scientific notation?

Back

Move the decimal point in the number until only one non-zero digit remains to the left. Count the number of places moved; this becomes the exponent of 10.

Front

What does a positive exponent in scientific notation indicate?

Back

The number is larger than 10.

Front

What does a negative exponent in scientific notation indicate?

Back

The number is smaller than 1.

Front

What is the formula for finding the slope of a line?

Back

Slope (m) = (change in y) / (change in x) or m = (y2 - y1) / (x2 - x1).

Front

If the slope of a line is -1/2, what does this indicate about the line?

Back

The line decreases as it moves from left to right, and for every 2 units it moves horizontally, it moves down 1 unit vertically.

Front

What is the slope of a line that rises 5 units and runs 2 units?

Back

The slope is 5/2.

Front

How do you find the slope from a table of values?

Back

Choose two points (x1, y1) and (x2, y2) from the table and use the formula m = (y2 - y1) / (x2 - x1).

Front

Back

x = 11.

Front

Back

Subtract 2x from both sides.