Click here for more information or see pages 328-330 in the book.
* Locked after
All Correct Answers shown after locked.
DON'T FREAK OUT when you submit. Will only show MY answers. Not yours. The score is what is important. (20/20)
First of all. You are MUCH smarter than this program.
What you would normally write as:
y - 3x = 2
The equation maker might write as
-1y + -3x = 2
or occasionally as
-1y + -3x + 0 = 2
That's okay. We know you're smart enough to ignore the superfluous information.
When you write an equation as y=mx+b then it is in slope-intercept form. The number in front of the x is the slope and the b is the y-intercept (the y-value when x is 0) For the slope= -4/3 and point (3,-1) The formula is y=mx+b. We know everything but b. Plugging in the slope and the points we get -1=-4/3(3)+b Which is -1=-4+b Which means b=3 Thus the formula is y=-4/3x+3 For the point (8,5) and point (-8,-1) The formula is find the slope and then do the same calculations as before with either point: Slope is rise over run. Rise is 5 - -1 or 6 Run is 8 - - 8 or 16 Slope is 6/16 or 3/8 or 0.375 Plugging the slope and the first point into our y=mx+b formula, we get 5=3/8(8)+b which is 5=3+b which means b=2 and our formula is y=3/8x+2