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The following chart shows the number of months a savings account has been open and the balance of the account. Find the slope of the line through these points. Number of Balance Months (dollars) 1 $400 5 $800 7 $1,000 10 $1,300 D 80 D. 100 UD 100 80

The following chart shows the number of months a savings account has been open and the balance of the account Find the slope of the line through these points Nu class=

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SOLUTION

To find the slope, let us take two y-values and two x-values. This becomes

[tex]\begin{gathered} y-\text{values 800 and 400} \\ x-\text{values 5 and 1} \end{gathered}[/tex]

The slope becomes

[tex]\begin{gathered} m=\frac{change\text{ in y}}{\text{change in x}} \\ m=\frac{800-400}{5-1} \\ m=\frac{400}{4} \\ m=100 \end{gathered}[/tex]

Hence the answer is 100, the third option.