Y intercept forrrm please help! ?

Question

so my points are 10.45, 9.81 & 49.23, 50.83

and my slope came out to 1.05

i need to know how to do the y intercept and

the line equation for this.

please help

Answer 1

The equation of the line will have the form

y=mx+c

where m is the slope and c is the intercept.

The slope is (50.83-9.81)/(49.23-10.45)=1.06 (rounding to 2dp).

Therefore the equation is

y=1.06x+c.

Now substitute in either point. I will use (10.45,9.81)

9.81=1.06(10.45)+c

=>c=-1.27 (2dp)

and the equation is

y=1.06x-1.27

(-1.27 is the y intercept).

Clearly keeping more decimal places in the values you calculate will improve the accuracy.