i need help on this question

Question

What is the slope-intercept form of the function that contains the point (3, 4) and has a slope of 2?

y =  x+

 

y=mx+b

Answer 1

When you have an equation in slope-intercept form y = mx + b the slope is equal to m.  The function contains the point (3,4), so plug the values that you know in to the equation and then solve for b

 

x = 3

y = 4

m = 2

 

y = mx + b

4 = (2)(3) + b

4 = 6 + b

-2 = b

 

Therefore b = -2 and the slope-intercept form of the function is 

 

y = 2x - 2