A line has a slope of 1 and a #y#-intercept of 3. What is the value of #y# when #x# is 7?

1 Answer
seol
Jul 23, 2017

#y=10#

Explanation:

Use slope-intercept format, #y=mx+b#. #m# is the slope variable, and #b# is the y-intercept.

#y=mx+b#
#y=(1)x+3# since #m=1# and #b=3#
#y=x+3# simplify: #(1)x = x#

Now we apply the x value of 7:

#y=x+3#
#y=7+3#
#y=10#

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