Question

Find m and b of y

Answer 1

Answer:

m = 2.25

b = 4.15

Step-by-step explanation:

Let us consider the points (1, 6.4) & (3, 10.9)

Slope (m) = (10.9 - 6.4)/(3 - 1) = 4.5/2 = 2.25

Now, by point slope formula of a line, we have:

$y - y_1 = m(x - x_1)$

$\therefore y - 6.4 = 2.25(x - 1)$

$\therefore y - 6.4 = 2.25x - 2.25$

$\therefore y = 2.25x - 2.25+6.4$

$\therefore y = 2.25x + 4.15$

Equating it with y = mx + b, we find:

m = 2.25

b = 4.15