Slope, 4, passes through the origin. Write an equation in slope-intercept form for the line that satisfies each set of conditions.

Textbook Question

Chapter 2, 2.4 - Problem 28 - Glencoe Algebra 2 (1st Edition, McGraw-Hill Education).
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kspcr111 | In Training Educator

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Given slope m= 4

and the line passes through the point (x,y)= (0, 0)

the slope-intercept form of a line is

y= mx+b

from the above we know m = 4, so the line equation is 

y= 4x+b--------------(1)

we need to find the value of b, as the line passes through the point

(x,y)= (0, 0 ), then on substituting we get

0 =0+b

=> b = 0

so the equation of the line is

y = 4x

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