jeffery invested $2500, part at 8% annum and the rest ar 10% annum. in one year, the two parts earned equal amount of interest. how much did he invest at each rate

Step-by-step explanation:

A mathematics teacher wanted to see the correlation between test scores and homework. The homework grade (x) and test grade (y) are given in the accompanying table. Write the linear regression equation that represents this set of data, rounding all coefficients to the nearest tenth. Using this equation, estimate the homework grade, to the nearest integer, for a student with a test grade of 31.

Homework Grade (x) Test Grade (y)

58 52

75 66

66 68

85 74

52 38

74 65

78 76