Work out 3/4 - 7/9 + 2/3

834 chirps

Step-by-step explanation:

Given the data:

Chirps in 1 min Temperature (°F)

781 74

1039 85.9

1156 87.2

1218 87.8

1131 91.4

888 75.5

Using technology, the regression model obtained will be in the form :

y = bx + c

b = slope ; c = intercept

y = temperature ; x = chirps per minute

The regression model is :

ŷ= 43.28 + 0.0390x

If outside temperature, y = 76 ; x will be ;

76 = 43.28 + 0.0390x

76 - 43.28 = 0.0390x

32.72 = 0.0390x

x = 32.72 / 0.0390

x = 838.97435

x = 834 chirps per minute