Question

B/ 21 Marks

What is the equation of the blue line
passing through (0,1) to (3,10)

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Answer 1

y = 3x + 1.

Explanation:

The slope is y2-y1/x2-x1

= 10/1/ 3-0

= 9/3

= 3.

Using the point-slope form for a straight line:

y-y1 = m(x-x1) (m = slope)

y - 10 = 3(x - 3)

y - 10 = 3x - 9

y = 3x - 9 + 10

y = 3x + 1 is the required equation.