
PETE C. answered 09/11/20
Texas STAAR, Algebra, SAT MATH, GED
how to write an equation of the line that is parallel to y = -3x +1 and passes through the point (4, 2)
SLOPE INTERCEPT FORMULA: Y = MX + B where M is the SLOPE,and
B is the Y-INTERCEPT(where the line crosses the Y axis, and X=0).
Given the STRAIGHT LINE aka LINEar EQUATION Y = -3X + 1, we know
the SLOPE is -3.
Since the two lines are PARALLEL, then their SLOPES ARE THE SAME, -3.
So, now we have Y = -3X + B
But, we need to solve for B, which is the Y-INTERCEPT by plugging in a value for X, and a value for Y, using the coordinate (4,2). So, X=4 and Y=2.
2 = -3(4) + B
2 = -12 + B
14 = B
ANSWER: Y = -3X + 14
Hope this helps you Corinne.