Question

Write the equation of a line that has a slope of 3 and goes through the point

(2, 1).

Help?

Answer 1

y = 3x - 5

Explanation:

You use the equation y = mx + b, and you plug in what you know. The slope is already 3 so you do y = 3x + b

after that, you plug in y and x, because (2,1) are the values of x and y.

1 = 3(2) + b

1 = 6 + b

subtract 6 from both sides to isolate the b

-5 = b