ASVAB Math Knowledge Practice Test 321240 Question 2 of 5

ASVAB Math Knowledge Practice Test 321240

Question 2 of 5

Slope-Intercept Equation

A line on the coordinate grid can be defined by a slope-intercept equation: y = mx + b. For a given value of x, the value of y can be determined given the slope (m) and y-intercept (b) of the line. The slope of a line is change in y over change in x, ${\Delta y \over \Delta x}$, and the y-intercept is the y-coordinate where the line crosses the vertical y-axis.

$y = -2$\frac{1}{2}$x - 1$

The endpoints of this line segment are at (-2, 4) and (2, -6). What is the slope-intercept equation for this line?

	y = -x + 3
	y = 2x + 3
	y = -2$\frac{1}{2}$x - 1
	y = 3x + 3

	y = -x + 3
	y = 2x + 3
	y = -2\(\frac{1}{2}\)x - 1
	y = 3x + 3