Question

There is a positive correlation between the number of times the Striped Ground Cricket chirps per second and the temperature in degrees Fahrenheit. If a scatter plot is made with the number of chirps on the horizontal axis and the trend line is found to be y = 3x + 25, then what would you predict the temperature in degrees Fahrenheit to be when there are 20 chirps per second?

-1.6
85
135

Answer 1

I think the answer is 85 im not sure

Answer 2

85 °F

Explanation:

The trend line equation is given by
`y=3x+25`

Where,

• 
  `x` is the number of chirps per second, and
• 
  `y` is the temperature in degrees Fahrenheit

We want to find the temperature when the number of chirps is 20. So we plug in 20 into
`x` and figure out
`y` :

`y=3x+25\\y=3(20)+25\\y=60+25\\y=85`