Mr. Valentine made a scatter plot with his students' homework averages on the x -axis and their test score averages on the y -axis. He calculated the equation of the line of best fit as y=0.9x+12 , with x and y as scores from 0 to 100. Joseph, one of Mr. Valentine's students, had a homework average of 80 and a residual of 3.

mark brainliest

step-by-step explanation:

2 tens + 6 ones

1 ten + 16 ones

0 tens + 26 ones

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

answer: 800

step-by-step explanation: