Write an equation of a line in slope-intercept form with two ordered pairs of (1, 13) and (2, 21).

Use this fraction:21-13

2-1

That goes to 7/1, or 7. The slope is 7.

Use the equation y=mx+b

y=7x+b

substitute x and y for numbers

13=7 (1) + b

Simplify

13=7+b

Subtract 7 from both sides

6=b

The equation in slope intercept form=

y=7x+6

Y=8x+5, that is the answer