Algebra 2, 2008

 PAGE: 88 SET: Exercises PROBLEM: 1

Treat the data as ordered pairs. From the table, write the Altitude as x - coordinate and the Temperature as y - coordinate.

Plot the ordered pairs as points in a coordinate plane.

The scatter plot shows a negative correlation between x and y. This means that as the x - values increased, the y - value tended to decrease, so you can fit a line to the data.

Draw a line that appears to fit the points in the scatter plot closely.

Write an equation using any two points on the line.

Substitute the values of in the slope formula .

.

To write the line equation, we can use either of the two given points.

Consider the point .

Substitute in point-slope form equation or .

Apply distributive property: .

.

The line equation is .

Substitute the value of in the above equation.

.

The missing value is , the equation is and its graph is

TESTIMONIALS
 "I want to tell you that our students did well on the math exam and showed a marked improvement that, in my estimation, reflected the professional development the faculty received from you. THANK YOU!!!" June Barnett "Your site is amazing! It helped me get through Algebra." Charles "My daughter uses it to supplement her Algebra 1 school work. She finds it very helpful." Dan Pease
 Tweets by @mathskeydotcom

QUESTIONS? LET US HELP.