8
QuizMultiple Choice
Point-Slope Form of a Line
Question 8 of 10 • TX-Algebra I A-CR
Talia wants to write the equation of the graphed line in point-slope form. These are the steps she plans to use:Step 1: Choose a point on the line, such as (2, 5).Step 2: Choose another point on the line, such as (1, 3).Step 3: Count units to determine the slope ratio. The line runs 1 unit to the right and rises 2 units up, so the slope is .Step 4: Substitute those values into the point-slope form.y – y1 = m(x – x1)y – 3 = (x – 1)Which of Talia’s steps is incorrect?
Answer
A
Step 1 is incorrect because it uses a point that is not on the line.B
Step 2 is incorrect because it uses a point that is not on the line.C
Step 3 is incorrect because it shows an incorrect ratio for the slope.D
Step 4 is incorrect because it shows an incorrect substitution of (1, 3) into the point-slope form.