Trend Line

Q.

List the ordered pairs shown in the mapping diagram.

Q. A scatter plot along with the line of best fit of $x$ and $y$ is shown below.
Determine the equation and slope of the line of best fit.

1. $12y=5x-26$
2. $12y=5x-56$
3. Slope $=\frac{25}{12}$
4. Slope $=\frac{5}{12}$

Q. Draw a line of best fit for the given plot.

Guess the slope of the line

1. $5$
2. $\frac{1}{5}$
3. $-5$
4. $-\frac{1}{5}$

Q. The line of best fit helps to understand the trend of the data set.
It predict the data values at any unknown points.

1. also helps to
2. does not
3. may or may not

Q. A is a line around which all the points are equally scattered. And, the is the trend line that comes closest to capturing the essence of the data.

1. line of best fit
2. trend line
3. straight line
4. perfect line

Q. The slope of the given line of best fit is $-50.$ It passes through the point $(1.5,37.5).$ Find the equation of the line and the value of $u$ for $v=\mathrm{0.75.}$

1. Equation of the line: $u-37.5=50(v-1.5)$
2. Equation of the line: $u-37.5=-50(v-1.5)$
3. For $v=0.75,u=7.5$
4. For $v=0.75,u=75$

Q. Consider the following data set of $x$ and $y.$

Choose the correct representation of line of best fit.

1. 
2. 
3. 
4. (a) and (b) above.