3y + 5x = 15 so y = -5/3 . x + 15 as in y = ax + b b = 15 is the point this line is crossing the y - axis (meaning x = 0) at (0 , 15) because y = f(0) = -5/3 . 0 + 15 = 15 and the slope a = dy / dx = -5 / 3 meaning 5 steps down and 3 steps right from (0 , 15) The line is crossing the x - axis (meaning y = 0) at y = -5/3 . x + 15 = 0 so x = - 15 . - 3/5 = 9 so at (9 , 0)
Hi! In this “mini-lesson” I show how to re-write an equation in slope intercept form… great work identifying the slope, y-intercept, and x-intercept from my example - Thanks for watching!
3y + 5x = 15 so y = -5/3 . x + 15 as in y = ax + b
b = 15 is the point this line is crossing the y - axis (meaning x = 0) at (0 , 15)
because y = f(0) = -5/3 . 0 + 15 = 15
and the slope a = dy / dx = -5 / 3 meaning 5 steps down and 3 steps right from (0 , 15)
The line is crossing the x - axis (meaning y = 0) at y = -5/3 . x + 15 = 0 so x = - 15 . - 3/5 = 9
so at (9 , 0)
Hi! In this “mini-lesson” I show how to re-write an equation in slope intercept form… great work identifying the slope, y-intercept, and x-intercept from my example - Thanks for watching!