139k views
5 votes
Describe and correct the error a student made when graphing
y+5=-(3)/(4)(x-8).

Describe and correct the error a student made when graphing y+5=-(3)/(4)(x-8).-example-1
User CurtJRees
by
7.2k points

1 Answer

5 votes

Answer/Step-by-step explanation:

3

y + 5 = ( - ) ------- (x - 8)

4

3

y + 5 = ( - ) ------- x + 6

4

3

y + 5 = ( - ) ------- x + 6

-5 4 -5

3

y = ( - ) ------- x + 1

4

m = slope = (-3/4)

b = y-intercept = (0, 1)

----------------------------------------------------------------------------------------------------------

The student's first error was in step 1.

Step 1 should involve plotting a point at (0, 1).

Step 2 should involve plotting a point 3 units down and 4 units right from the point in step 1, at (4, -2).

Step 3, connecting the points with a line was correct.

----------------------------------------------------------------------------------------------------------

I hope this helps!

User Marc Barbeau
by
6.8k points