Hello! please help! will give brainliest to correct answer! will report if you troll... thank you:)

In a coordinate point, the values would go (x,y). Substitute the x and y values from the coordinate points into the equation given.
8(3)+B(4)=40

Multiply 8x3
24+B(4)=40

Subtract 24 from both sides

4B=16

Divide the whole equation by 4

B=4

This is too long-standing now get out