Question

Find an equation of the line having slope -2 that passes through the point (1, 5)

Answer 1

Slope of -2, (1,5)

y = mx + b
slope(m) = -2
(1,5)...x = 1 and y = 5
now we sub and find b, the y int
5 = -2(1) + b
5 = -2 + b
5 + 2 = b
7 = b
so ur equation is : y = -2x + 7

The approximation method used to estimate a point between 2 given points is called linear interpolation. The approximation method used to estimate a point that does not lie between 2 given points is called linear extrapolation.A linear function has the form f(x) = mx + b. Its graph is a line that has slope m and y intercept at (0,b).

Answer 2

Solutions 

We know that we are given the slope of -2, (1,5). 

Calculations 

$y = mx + b$

$slope(m) = -2$

$(1,5)=\ \textgreater \ x = 1 + y = 5$

Our next step wll be to substitude and find variable b

$5 = -2(1) + b$

$5 = -2 + b$

$5 + 2 = b$

$7 = b$

equation =  $y = -2x + 7$ 

Therefore, 

                 The approximation method used to estimate a point between 2 given points is called linear interpolation. The approximation method used to estimate a point that does not lie between 2 given points is called linear extrapolation.A linear function has the form f(x) = mx + b. Its graph is a line that has slope m and y intercept at (0,b).