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 number of chirps per second to be when the temperature is 55 degrees Fahrenheit?

Answer 1

y = 3x + 25

y = temperature = 55 degrees

x = number of chirps

55 = 3x + 25
subtract 25 from each side
30 = 3x
divide both sides by 3
x=30/3 = 10

x= 10

10 chirps per second

Answer 2

the number of chirps is on the horizontal axis.....so the number of chirps is gonna be the x value and the temp is the y value.

y = 3x + 25......when the temp is 55....so y = 55
55 = 3x + 25
55 - 25 = 3x
30 = 3x
30/3 = x
10 = x.......number of chirps per second is 10 <==