### Bar Graphs. When to Use It.

Bar graphs are just what they sound like: graphs that use bars to compare different quantities.
The bars are usually vertical, but it is possible to make a horizontal bar graph, too. Each bar represents a different quantity, and the height (or horizontal length) of the bar corresponds to the size of the number. Continue reading “Bar Graphs. When to Use It.”

### Line Graphs Examples

A line graph is a graph that connects points with line segments. The lines help to clarify the pattern of change in the values the points represent.

Line graphs are generally used to show the change in a quantity over time. A runner might record her times at each daily practice and create a line graph to help her see the pattern of improvement, or to see if there was a particular time when her times were slower or faster than usual. Continue reading “Line Graphs Examples”

### Ratios and Rates

The table shows the cards in a card
game. Notice that 24 out of the 108
cards are yellow.

 Heart 24 Yellow 24 Purple 24 Green 24 Wild Draw 10 Extra Cards 2

You can compare these two numbers
by using a ratio. Recall that the ratio
that compares 24 to 108 can be
written in several ways. Continue reading “Ratios and Rates”

### Ratios and Probability

Suppose the probability that a basketball player makes a basket from the free throw line is 0.75. Since the decimal 0.75 means seventy-five
hundredths, the probability can also be expressed as the ratio
.
This means that the player makes a free throw 75 out of 100 times. In
this lab, you will explore ratios and probability. Continue reading “Ratios and Probability”

### Exploring Ratio, Proportion, and Percent

In this chapter, students learn to express ratios and rates
as fractions and to solve proportions by using cross
products. Then, using their knowledge of ratios, students
find actual lengths from scale drawings. Students explore
the relationship among fractions, decimals, and percents
as well as find the percent of a number. Students also
learn to solve problems by drawing a diagram. Continue reading “Exploring Ratio, Proportion, and Percent”

### Exponential Functions

There are two types of exponential functions: .exponential growth and exponential decay The base of an exponential growth function is
a number greater than one. The base of an exponential decay function is a number between 0 and 1.

Exponential functions are frequently used to model the growth or decay of a
population. You can use the y-intercept and one other point on the graph to write the equation of an exponential function. Continue reading “Exponential Functions”